That doesn't happen to me. The only I got is that every time I try to update from the Lenovo shop, it give me a "fail to parse package" error. This is the only app I just can't update normally, I always have to uninstall and reinstall the updated app. Annoying as I always have to backup all my notes before i uninstall and reload once I'm updated. Anybody else having this issue with this or any other app?
Oh, and you can go to the developer website and download previous versions from there.