Oh....right....I forgot I didn't add that option to the public windows release. Since you can access the save files freely on windows, it felt rather redundant. :D
You can send me the android exported save file to my mail at Naughty-Netherpunch@web.de and I'll turn it into a normal windows save with the import feature. Afterwards, if everything works, I'll send you back the save for windows.
Sorry for the troubles.