JustScrobble received an update to work-around the "Token expired. Please return to JustScrobble and try again."-issue caused by the broken API of last.fm. With version 188.8.131.52 JustScrobble uses the authentication-method for mobile applications, which requires entering the username and password, as this one currently works. The recommended way for desktop applications to authenticate is broken since the redesign of last.fm. Version 184.108.40.206 is still available for download, though.