I cannot log in to my old account since I have to buy the pro version in order to log in at first. So my past progress is lost. Also, I cannot purchase the pro version neither: 'error(6)' I have reinstalled, forced stop, cleared cache, etc multiple times. I have added a paying method to my google play account as well. Nothing has helped and I haven't received an answer to my email to you yet. This makes me sad because I like the app to much to deinstall it.