Update 0.35 is supposed to be released today... and how do I update without losing my progress?
It depends on the type of version you're playing. If it's on PC, then you can delete the game and install the new version, without losing your saves, as they are stored in a separate folder in the memory. On the other hand, if you're playing on Android, the game updates with each new version, so if you delete the files, you will lose all your saves. On Android you just need to update the game, without deleting it.