To uninstall the Windows 7 (Version 3.3.7) or Windows 8 Wunderlist app, navigate to:
If you have trouble finding that Folder, then go to your Control Panel's Advanced Settings. Select "Show hidden files, folders and drives", then click "OK."
Once you've located and opened the folder, please run "uninstaller.exe". This will completely uninstall Wunderlist from your PC.