diff --git a/locales/fr/main.po b/locales/fr/main.po
index 0dffe1e..30d84ec 100644
--- a/locales/fr/main.po
+++ b/locales/fr/main.po
@@ -1,15 +1,15 @@
 # Language: Français
-# Module: Uninstaller - 0.2
-# Date: 2023-04-16 09:40:12
+# Module: Uninstaller - 0.4
+# Date: 2023-04-23 15:51:03
 # Author: , contact@jcdenis.fr
 # Translated with translater 2023.03.19
 
 msgid ""
 msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
-"Project-Id-Version: Uninstaller 0.2\n"
+"Project-Id-Version: Uninstaller 0.4\n"
 "POT-Creation-Date: \n"
-"PO-Revision-Date: 2023-04-16T09:40:12+00:00\n"
+"PO-Revision-Date: 2023-04-23T15:51:03+00:00\n"
 "Last-Translator: Jean-Christian Denis\n"
 "Language-Team: \n"
 "MIME-Version: 1.0\n"
@@ -100,6 +100,74 @@ msgstr "fichiers et répertoires du plugin \"%s\" effacés"
 msgid "Failed to delete \"%s\" plugin files and directories"
 msgstr "Impossible d'effacer les fichiers et répertoires du plugin \"%s\""
 
+#: src/Cleaner/Preferences.php:40
+msgid "Preferences"
+msgstr "Préférences"
+
+#: src/Cleaner/Preferences.php:41
+msgid "Users preferences workspaces"
+msgstr "Préférences utilisateurs (workspaces)"
+
+#: src/Cleaner/Preferences.php:50
+msgid "delete selected global preferences workspaces"
+msgstr "effacer les préférences globales"
+
+#: src/Cleaner/Preferences.php:51
+msgid "delete \"%s\" global preferences workspace"
+msgstr "effacer les préférences globales \"%s\""
+
+#: src/Cleaner/Preferences.php:52
+msgid "\"%s\" global preferences workspace deleted"
+msgstr "préférences globales \"%s\" effacées"
+
+#: src/Cleaner/Preferences.php:53
+msgid "Failed to delete \"%s\" global preferences workspace"
+msgstr "Impossible d'effacer les préférences globales \"%s\""
+
+#: src/Cleaner/Preferences.php:57
+msgid "delete selected users preferences workspaces"
+msgstr "effacer les préférences utilisateurs sélectionnées"
+
+#: src/Cleaner/Preferences.php:58
+msgid "delete \"%s\" users preferences workspace"
+msgstr "effacer les préférences utilisateurs \"%s\""
+
+#: src/Cleaner/Preferences.php:59
+msgid "\"%s\" users preferences workspace deleted"
+msgstr "préférences utilistateurs \"%s\" effacées"
+
+#: src/Cleaner/Preferences.php:60
+msgid "Failed to delete \"%s\" users preferences workspace"
+msgstr "Impossible d'effacer les préférences utilisateurs \"%s\""
+
+#: src/Cleaner/Preferences.php:64
+msgid "delete selected preferences workspaces"
+msgstr "effacer les préférences selectionnées"
+
+#: src/Cleaner/Preferences.php:65
+msgid "delete \"%s\" preferences workspace"
+msgstr "effacer les préférences \"%s\""
+
+#: src/Cleaner/Preferences.php:66
+msgid "\"%s\" preferences workspace deleted"
+msgstr "préférences \"%s\" effacées"
+
+#: src/Cleaner/Preferences.php:67
+msgid "Failed to delete \"%s\" preferences workspace"
+msgstr "Impossible d'effacer les préférences \"%s\""
+
+#: src/Cleaner/Preferences.php:72
+msgid "delete related preferences"
+msgstr "effacer les préférences associées"
+
+#: src/Cleaner/Preferences.php:73
+msgid "related preferences deleted"
+msgstr "préférences associées effacées"
+
+#: src/Cleaner/Preferences.php:74
+msgid "Failed to delete related preferences"
+msgstr "Impossible d'effacer les préférences associées"
+
 #: src/Cleaner/Settings.php:41
 msgid "Namespaces registered in dcSettings"
 msgstr "Espaces de nom (namespaces) enregistrés dans dcSettings"
@@ -164,39 +232,39 @@ msgstr "paramètres relatifs effacer"
 msgid "Failed to delete related settings"
 msgstr "Impossible d'effacer les paramètres relatifs"
 
-#: src/Cleaner/Tables.php:36
+#: src/Cleaner/Tables.php:37
 msgid "All database tables of Dotclear"
 msgstr "Toutes les tables Dotclear de la base de données"
 
-#: src/Cleaner/Tables.php:45
+#: src/Cleaner/Tables.php:46
 msgid "delete selected tables"
 msgstr "effacer les tables sélectionnées"
 
-#: src/Cleaner/Tables.php:46
+#: src/Cleaner/Tables.php:47
 msgid "delete \"%s\" table"
 msgstr "Supprimer la table \"%s\""
 
-#: src/Cleaner/Tables.php:47
+#: src/Cleaner/Tables.php:48
 msgid "\"%s\" table deleted"
 msgstr "table \"%s\" supprimée"
 
-#: src/Cleaner/Tables.php:48
+#: src/Cleaner/Tables.php:49
 msgid "Failed to delete \"%s\" table"
 msgstr "Impossible de supprimer la table \"%s\""
 
-#: src/Cleaner/Tables.php:52
+#: src/Cleaner/Tables.php:53
 msgid "empty selected tables"
 msgstr "vider les tables selectionnées"
 
-#: src/Cleaner/Tables.php:53
+#: src/Cleaner/Tables.php:54
 msgid "empty \"%s\" table"
 msgstr "vider la table \"%s\""
 
-#: src/Cleaner/Tables.php:54
+#: src/Cleaner/Tables.php:55
 msgid "\"%s\" table emptied"
 msgstr "table \"%s\" vidée"
 
-#: src/Cleaner/Tables.php:55
+#: src/Cleaner/Tables.php:56
 msgid "Failed to empty \"%s\" table"
 msgstr "Impossible de vider la table \"%s\""
 
@@ -260,47 +328,47 @@ msgstr "numéro de version de \"%s\" supprimé"
 msgid "Failed to delete \"%s\" version number"
 msgstr "Impossible de supprimer le numéro de version de \"%s\""
 
-#: src/Cleaners.php:84
+#: src/Cleaners.php:87
 msgid "Unknown cleaner \"%s\""
 msgstr "Nettoyeur \"%s\" inconnu"
 
-#: src/Cleaners.php:87
+#: src/Cleaners.php:90
 msgid "Unsintaller can't remove itself"
 msgstr "Le désinstalleur ne peut pas se supprimer lui-même"
 
-#: src/Manage.php:64
+#: src/Manage.php:65
 msgid "Unknown module id to uninstall"
 msgstr "Module a désinstaller inconnu"
 
-#: src/Manage.php:71
+#: src/Manage.php:73
 msgid "There are no uninstall actions for this module"
 msgstr "Il n'y a aucune action pour ce module"
 
-#: src/Manage.php:93
+#: src/Manage.php:98
 msgid "Uninstall action successfuly excecuted"
 msgstr "Actions de désinstallation exécutées avec succès"
 
-#: src/Manage.php:96
+#: src/Manage.php:101
 msgid "No uninstall action done"
 msgstr "Aucune action de désinstallation exécutée"
 
-#: src/Manage.php:125
+#: src/Manage.php:129
 msgid "Are you sure you perform these ations?"
 msgstr "Êtes-vous sûre de vouloir effectuer ces actions ?"
 
-#: src/Manage.php:154
+#: src/Manage.php:158
 msgid "Perform selected actions"
 msgstr "Effectuer les actions sélectionnées"
 
-#: src/Manage.php:160
+#: src/Manage.php:164
 msgid "Uninstall theme \"%s\""
 msgstr "Désinstaller le thème \"%s\""
 
-#: src/Manage.php:160
+#: src/Manage.php:164
 msgid "Uninstall plugin \"%s\""
 msgstr "Désinstaller le plugin \"%s\""
 
-#: src/Manage.php:161
+#: src/Manage.php:165
 msgid "The module \"%s %s\" offers advanced unsintall process:"
 msgstr "Le module \"%s %s\" propose un processus de désinstallation avancée :"
 
diff --git a/src/Cleaner/Preferences.php b/src/Cleaner/Preferences.php
new file mode 100644
index 0000000..65e4f51
--- /dev/null
+++ b/src/Cleaner/Preferences.php
@@ -0,0 +1,190 @@
+<?php
+/**
+ * @brief Uninstaller, a plugin for Dotclear 2
+ *
+ * @package Dotclear
+ * @subpackage Plugin
+ *
+ * @author Jean-Christian Denis and Contributors
+ *
+ * @copyright Jean-Christian Denis
+ * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
+declare(strict_types=1);
+
+namespace Dotclear\Plugin\Uninstaller\Cleaner;
+
+use dcCore;
+use dcWorkspace;
+use Dotclear\Database\Statement\{
+    DeleteStatement,
+    SelectStatement
+};
+use Dotclear\Plugin\Uninstaller\{
+    AbstractCleaner,
+    ActionDescriptor
+};
+
+/**
+ * Users preferences cleaner.
+ *
+ * Cleaner manages entire users preferences workspace
+ * except 'delete_related' which can pickup preference ws/id pairs
+ */
+class Preferences extends AbstractCleaner
+{
+    protected function properties(): array
+    {
+        return [
+            'id'   => 'preferences',
+            'name' => __('Preferences'),
+            'desc' => __('Users preferences workspaces'),
+        ];
+    }
+
+    protected function actions(): array
+    {
+        return [
+            new ActionDescriptor([
+                'id'      => 'delete_global',
+                'select'  => __('delete selected global preferences workspaces'),
+                'query'   => __('delete "%s" global preferences workspace'),
+                'success' => __('"%s" global preferences workspace deleted'),
+                'error'   => __('Failed to delete "%s" global preferences workspace'),
+            ]),
+            new ActionDescriptor([
+                'id'      => 'delete_local',
+                'select'  => __('delete selected users preferences workspaces'),
+                'query'   => __('delete "%s" users preferences workspace'),
+                'success' => __('"%s" users preferences workspace deleted'),
+                'error'   => __('Failed to delete "%s" users preferences workspace'),
+            ]),
+            new ActionDescriptor([
+                'id'      => 'delete_all',
+                'select'  => __('delete selected preferences workspaces'),
+                'query'   => __('delete "%s" preferences workspace'),
+                'success' => __('"%s" preferences workspace deleted'),
+                'error'   => __('Failed to delete "%s" preferences workspace'),
+            ]),
+            // $ns = 'pref_ws:pref_id;pref_ws:pref_id;...' for global and users preferences
+            new ActionDescriptor([
+                'id'      => 'delete_related',
+                'query'   => __('delete related preferences'),
+                'success' => __('related preferences deleted'),
+                'error'   => __('Failed to delete related preferences'),
+            ]),
+        ];
+    }
+
+    public function distributed(): array
+    {
+        return [
+            'accessibility',
+            'interface',
+            'maintenance',
+            'profile',
+            'dashboard',
+            'favorites',
+            'toggles',
+        ];
+    }
+
+    public function values(): array
+    {
+        $sql = new SelectStatement();
+        $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+            ->columns(['pref_ws'])
+            ->where($sql->orGroup(['user_id IS NULL', 'user_id IS NOT NULL']))
+            ->group('pref_ws');
+
+        $res = $sql->select();
+        if ($res == null || $res->isEmpty()) {
+            return [];
+        }
+
+        $rs = [];
+        $i  = 0;
+        while ($res->fetch()) {
+            $sql = new SelectStatement();
+            $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+                ->fields([$sql->count('*')])
+                ->where($sql->orGroup(['user_id IS NULL', 'user_id IS NOT NULL']))
+                ->and('pref_ws = ' . $sql->quote($res->f('pref_ws')))
+                ->group('pref_ws');
+
+            $rs[$i]['key']   = $res->f('pref_ws');
+            $rs[$i]['value'] = (int) $sql->select()?->f(0);
+            $i++;
+        }
+
+        return $rs;
+    }
+
+    public function execute(string $action, string $ns): bool
+    {
+        $sql = new DeleteStatement();
+
+        if ($action == 'delete_global' && self::checkNs($ns)) {
+            $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+                ->where('user_id IS NULL')
+                ->and('pref_ws = ' . $sql->quote((string) $ns))
+                ->delete();
+
+            return true;
+        }
+        if ($action == 'delete_local' && self::checkNs($ns)) {
+            $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+                ->where('user_id = ' . $sql->quote((string) dcCore::app()->blog?->id))
+                ->and('pref_ws = ' . $sql->quote((string) $ns))
+                ->delete();
+
+            return true;
+        }
+        if ($action == 'delete_all' && self::checkNs($ns)) {
+            $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+                ->where('pref_ws = ' . $sql->quote((string) $ns))
+                ->and($sql->orGroup(['user_id IS NULL', 'user_id IS NOT NULL']))
+                ->delete();
+
+            return true;
+        }
+        if ($action == 'delete_related') {
+            // check ns match ws:id;
+            $reg_ws = substr(dcWorkspace::WS_NAME_SCHEMA, 2, -2);
+            $reg_id = substr(dcWorkspace::WS_ID_SCHEMA, 2, -2);
+            if (!preg_match_all('#((' . $reg_ws . '):(' . $reg_id . ');?)#', $ns, $matches)) {
+                return false;
+            }
+
+            // build ws/id requests
+            $or = [];
+            foreach ($matches[2] as $key => $name) {
+                $or[] = $sql->andGroup(['pref_ws = ' . $sql->quote((string) $name), 'pref_id = ' . $sql->quote((string) $matches[3][$key])]);
+            }
+            if (empty($or)) {
+                return false;
+            }
+
+            $sql->from(dcCore::app()->prefix . dcWorkspace::WS_TABLE_NAME)
+                ->where($sql->orGroup($or))
+                ->and($sql->orGroup(['user_id IS NULL', 'user_id IS NOT NULL']))
+                ->delete();
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Check well formed ns.
+     *
+     * @param   string  The ns to check
+     *
+     * @return  bool    True on well formed
+     */
+    private static function checkNs(string $ns): bool
+    {
+        return preg_match(dcWorkspace::WS_NAME_SCHEMA, $ns);
+    }
+}
diff --git a/src/Prepend.php b/src/Prepend.php
index 7b83e58..43242a7 100644
--- a/src/Prepend.php
+++ b/src/Prepend.php
@@ -38,6 +38,7 @@ class Prepend extends dcNsProcess
         dcCore::app()->addBehavior('UninstallerCleanersConstruct', function (Cleaners $cleaners): void {
             $cleaners
                 ->add(new Cleaner\Settings())
+                ->add(new Cleaner\Preferences())
                 ->add(new Cleaner\Tables())
                 ->add(new Cleaner\Versions())
                 ->add(new Cleaner\Logs())