diff --git a/modern49.js b/gnome45-48.js
similarity index 98%
rename from modern49.js
rename to gnome45-48.js
index 00c162d..2eecbff 100644
--- a/modern49.js
+++ b/gnome45-48.js
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////
-//      Simple‑Tiling – MODERN (GNOME Shell 45+)          //
+//      Simple‑Tiling – MODERN (GNOME Shell 45-48)          //
 //               © 2025 domoel – MIT                       //
 /////////////////////////////////////////////////////////////
 
@@ -347,8 +347,8 @@ class Tiler {
                 if (index > -1) this._centerTimeoutIds.splice(index, 1);
 
                 if (!win || !win.get_display()) return GLib.SOURCE_REMOVE;
-                if (win.is_maximized())
-                    win.unmaximize();
+                if (win.get_maximized())
+                    win.unmaximize(Meta.MaximizeFlags.BOTH);
 
                 const monitorIndex = win.get_monitor();
                 const workspace = this._workspaceManager.get_active_workspace();
@@ -558,7 +558,7 @@ class Tiler {
             height: workArea.height - 2 * this._outerGapVertical,
         };
         windowsToTile.forEach((win) => {
-            if (win.is_maximized()) win.unmaximize();
+            if (win.get_maximized()) win.unmaximize(Meta.MaximizeFlags.BOTH);
         });
         if (windowsToTile.length === 1) {
             windowsToTile[0].move_resize_frame(
diff --git a/modern.js b/modern.js
index 7302cbb..03c319c 100644
--- a/modern.js
+++ b/modern.js
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////
-//      Simple‑Tiling – MODERN (GNOME Shell 45+)          //
+//      Simple‑Tiling – MODERN (GNOME Shell 49+)          //
 //               © 2025 domoel – MIT                       //
 /////////////////////////////////////////////////////////////
 
@@ -347,8 +347,8 @@ class Tiler {
                 if (index > -1) this._centerTimeoutIds.splice(index, 1);
 
                 if (!win || !win.get_display()) return GLib.SOURCE_REMOVE;
-                if (win.get_maximized())
-                    win.unmaximize(Meta.MaximizeFlags.BOTH);
+                if (win.is_maximized())
+                    win.unmaximize();
 
                 const monitorIndex = win.get_monitor();
                 const workspace = this._workspaceManager.get_active_workspace();
@@ -558,7 +558,7 @@ class Tiler {
             height: workArea.height - 2 * this._outerGapVertical,
         };
         windowsToTile.forEach((win) => {
-            if (win.get_maximized()) win.unmaximize(Meta.MaximizeFlags.BOTH);
+            if (win.is_maximized()) win.unmaximize();
         });
         if (windowsToTile.length === 1) {
             windowsToTile[0].move_resize_frame(
diff --git a/prefs_gnome45-48.js b/prefs_gnome45-48.js
new file mode 100644
index 0000000..829b70d
--- /dev/null
+++ b/prefs_gnome45-48.js
@@ -0,0 +1,91 @@
+///////////////////////////////////////////////////////////////
+//     Simple-Tiling – MODERN MENU (GNOME Shell 45+)         //
+//                   © 2025 domoel – MIT                     //
+///////////////////////////////////////////////////////////////
+
+// ── GLOBAL IMPORTS ────────────────────────────────────────
+import Adw from 'gi://Adw';
+import Gio from 'gi://Gio';
+import Gtk from 'gi://Gtk';
+import GLib from 'gi://GLib';
+import { ExtensionPreferences, gettext as _ } from 'resource:///org/gnome/Shell/Extensions/js/extensions/prefs.js';
+
+export default class SimpleTilingPrefs extends ExtensionPreferences {
+    fillPreferencesWindow(window) {
+        const settings = this.getSettings();
+        const page = new Adw.PreferencesPage();
+        window.add(page);
+
+        // ── WINDOW GAPS ────────────────────────────────────────────
+        const groupGaps = new Adw.PreferencesGroup({
+            title: 'Window Gaps',
+            description: 'Adjust spacing between windows and screen edges.'
+        });
+        page.add(groupGaps);
+
+        const rowInnerGap = new Adw.SpinRow({
+            title: 'Inner Gap',
+            subtitle: 'Space between tiled windows (pixels)',
+            adjustment: new Gtk.Adjustment({ lower: 0, upper: 100, step_increment: 1 }),
+        });
+        groupGaps.add(rowInnerGap);
+        settings.bind('inner-gap', rowInnerGap, 'value', Gio.SettingsBindFlags.DEFAULT);
+
+        const rowOuterH = new Adw.SpinRow({
+            title: 'Outer Gap (horizontal)',
+            subtitle: 'Left / right screen edges (pixels)',
+            adjustment: new Gtk.Adjustment({ lower: 0, upper: 100, step_increment: 1 }),
+        });
+        groupGaps.add(rowOuterH);
+        settings.bind('outer-gap-horizontal', rowOuterH, 'value', Gio.SettingsBindFlags.DEFAULT);
+
+        const rowOuterV = new Adw.SpinRow({
+            title: 'Outer Gap (vertical)',
+            subtitle: 'Top / bottom screen edges (pixels)',
+            adjustment: new Gtk.Adjustment({ lower: 0, upper: 100, step_increment: 1 }),
+        });
+        groupGaps.add(rowOuterV);
+        settings.bind('outer-gap-vertical', rowOuterV, 'value', Gio.SettingsBindFlags.DEFAULT);
+
+        // ── WINDOW BEHAVIOR ────────────────────────────────────────────
+        const groupBehavior = new Adw.PreferencesGroup({ title: 'Window Behavior' });
+        page.add(groupBehavior);
+
+        const rowNewWindow = new Adw.ComboRow({
+            title: 'Open new windows as',
+            subtitle: 'Whether a new window starts as Master or Stack',
+            model: new Gtk.StringList({
+                strings: ['Stack Window (Default)', 'Master Window'],
+            }),
+        });
+        groupBehavior.add(rowNewWindow);
+
+        const currentBehavior = settings.get_string('new-window-behavior');
+        rowNewWindow.selected = currentBehavior === 'master' ? 1 : 0;
+
+        rowNewWindow.connect('notify::selected', () => {
+            const newVal = rowNewWindow.selected === 1 ? 'master' : 'stack';
+            settings.set_string('new-window-behavior', newVal);
+        });
+
+        // ── KEYBINDINGS ────────────────────────────────────────────
+        const groupKeys = new Adw.PreferencesGroup({ title: 'Keybindings' });
+        page.add(groupKeys);
+
+        const rowKeys = new Adw.ActionRow({
+            title: 'Configure Shortcuts',
+            subtitle: 'Adjust all shortcuts in GNOME Keyboard settings.',
+        });
+        groupKeys.add(rowKeys);
+
+        const btnOpenKeyboard = new Gtk.Button({ label: 'Open Keyboard Settings' });
+        btnOpenKeyboard.connect('clicked', () => {
+            const appInfo = Gio.AppInfo.create_from_commandline(
+                'gnome-control-center keyboard', null, Gio.AppInfoCreateFlags.NONE
+            );
+            appInfo.launch([], null);
+        });
+        rowKeys.add_suffix(btnOpenKeyboard);
+        rowKeys.set_activatable_widget(btnOpenKeyboard);
+    }
+}
diff --git a/prefs_modern.js b/prefs_modern.js
index 829b70d..a97bb97 100644
--- a/prefs_modern.js
+++ b/prefs_modern.js
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////
-//     Simple-Tiling – MODERN MENU (GNOME Shell 45+)         //
+//     Simple-Tiling – MODERN MENU (GNOME Shell 49+)         //
 //                   © 2025 domoel – MIT                     //
 ///////////////////////////////////////////////////////////////