diff --git a/prefs.js b/prefs.js
index 8575c18..d87f323 100644
--- a/prefs.js
+++ b/prefs.js
@@ -28,6 +28,7 @@ const _ = imports.gettext.domain('burn-my-windows').gettext;
 
 const ExtensionUtils = imports.misc.extensionUtils;
 const Me             = imports.misc.extensionUtils.getCurrentExtension();
+const migrate        = Me.imports.src.migrate;
 const utils          = Me.imports.src.utils;
 const ProfileManager = Me.imports.src.ProfileManager.ProfileManager;
 
@@ -67,6 +68,8 @@ var PreferencesDialog = class PreferencesDialog {
       new Me.imports.src.effects.Wisps.Wisps(),
     ];
 
+    migrate.migrate();
+
     // Load all of our resources.
     this._resources = Gio.Resource.load(Me.path + '/resources/burn-my-windows.gresource');
     Gio.resources_register(this._resources);
diff --git a/src/migrate.js b/src/migrate.js
new file mode 100644
index 0000000..b22a156
--- /dev/null
+++ b/src/migrate.js
@@ -0,0 +1,116 @@
+//////////////////////////////////////////////////////////////////////////////////////////
+//          )                                                   (                       //
+//       ( /(   (  (               )    (       (  (  (         )\ )    (  (            //
+//       )\()) ))\ )(   (         (     )\ )    )\))( )\  (    (()/( (  )\))(  (        //
+//      ((_)\ /((_|()\  )\ )      )\  '(()/(   ((_)()((_) )\ )  ((_)))\((_)()\ )\       //
+//      | |(_|_))( ((_)_(_/(    _((_))  )(_))  _(()((_|_)_(_/(  _| |((_)(()((_|(_)      //
+//      | '_ \ || | '_| ' \))  | '  \()| || |  \ V  V / | ' \)) _` / _ \ V  V (_-<      //
+//      |_.__/\_,_|_| |_||_|   |_|_|_|  \_, |   \_/\_/|_|_||_|\__,_\___/\_/\_//__/      //
+//                                 |__/                                                 //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+'use strict';
+
+const ExtensionUtils = imports.misc.extensionUtils;
+const Me             = imports.misc.extensionUtils.getCurrentExtension();
+const utils          = Me.imports.src.utils;
+
+function migrate() {
+  utils.executeCommand(['dconf', 'dump', '/org/gnome/shell/extensions/burn-my-windows/'])
+    .catch(r => utils.debug('Failed to get old settings for effect migration: ' + r))
+    .then(r => {
+      utils.debug('Starting Burn-My-Windows profile migration!');
+
+      // Remove some unnecessary lines.
+      r = r.replace(/^active-profile=.*\n?/gm, '');
+      r = r.replace(/^test-mode=.*\n?/gm, '');
+      r = r.replace(/^.*-preview-.*\n?/gm, '');
+      r = r.replace('[/]\n', '');
+
+      // There were some inconsistencies in the key names.
+      r.replace('flame-', 'fire-');
+      r.replace('claw-', 'trex-');
+
+      let lines = r.split('\n');
+
+      // Find all effects which were used for openeing and closing. This first extracts
+      // all lines which end in "-open-effect=true" and then remove this suffix from the
+      // lines. This leaves only the effect nicks.
+      let openEffects = lines.filter(l => l.includes('-open-effect=true'))
+                          .map(l => l.replace('-open-effect=true', ''));
+      let closeEffects = lines.filter(l => l.includes('-close-effect=true'))
+                           .map(l => l.replace('-close-effect=true', ''));
+
+      // The fire effect is enabled per default, so we have to add it if it's not
+      // explicitly disabled.
+      if (!r.includes('fire-open-effect=false') && !openEffects.includes('fire')) {
+        openEffects.push('fire');
+      }
+
+      if (!r.includes('fire-close-effect=false') && !closeEffects.includes('fire')) {
+        closeEffects.push('fire');
+      }
+
+      utils.debug('Enabled open effects: ' + openEffects);
+      utils.debug('Enabled close effects: ' + closeEffects);
+
+      // If the same effects were used for opening and closing windows, only one profile
+      // is required. Else we have to create two new profiles.
+      const numProfiles = openEffects.join() == closeEffects.join() ? 1 : 2;
+      if (numProfiles == 1) {
+        utils.debug('Only one profile is required.');
+      } else {
+        utils.debug('Two profiles are required.');
+      }
+
+      // The default value of this is false, so if it is not present, only normal windows
+      // were affected.
+      const onlyNormalWindows = !r.includes('destroy-dialogs=true');
+      if (onlyNormalWindows) {
+        utils.debug('Only normal windows will be burned by the new profile(s).');
+      } else {
+        utils.debug('Normal windows and dialogs will be burned by the new profile(s).');
+      }
+
+      const profile =
+        lines.filter(l => !l.includes('-close-effect=') && !l.includes('-open-effect='));
+      profile.unshift('[burn-my-windows-profile]');
+      if (onlyNormalWindows) {
+        profile.push('profile-window-type=1');
+      }
+
+      if (numProfiles == 1) {
+        openEffects.forEach(e => profile.push(e + '-enable-effect=true'));
+        if (!openEffects.includes('fire')) {
+          profile.push('fire-enable-effect=false');
+        }
+
+        utils.debug('The new profile:');
+        utils.debug(profile.join('\n'));
+
+      } else {
+
+        const closeProfile = [...profile];
+        const openProfile  = [...profile];
+
+        openEffects.forEach(e => openProfile.push(e + '-enable-effect=true'));
+        if (!openEffects.includes('fire')) {
+          openProfile.push('fire-enable-effect=false');
+        }
+
+        closeEffects.forEach(e => closeProfile.push(e + '-enable-effect=true'));
+        if (!closeEffects.includes('fire')) {
+          closeProfile.push('fire-enable-effect=false');
+        }
+
+        utils.debug('The new open-window profile:');
+        utils.debug(openProfile.join('\n'));
+        utils.debug('The new close-window profile:');
+        utils.debug(closeProfile.join('\n'));
+      }
+    })
+    .catch(r => utils.debug('Failed migrate settings: ' + r));
+}
\ No newline at end of file