Standard Renpy problem where the saves won't work if you saved on the label which was changes in the new version. Try out more different saves, especially I recommend to check out the Auto saves as they save the game in most random locations and you shouldn't lose too much progress.
Because SubscribeStar page is still under the review, and it's a long process with them. The links has been already added here though, directly above the download button.
You need to find the folder with your save files on your phone and transfer it to the folder with save files on your pc. It might corrupt the saves though.
The same logic goes for updating to the newer version. On pc you won't have problems since the save folder is the same between all versions. On mobile they are different. So you need to find the save files in the old version and transfer them to the new one.
You've encountered a bug which occurred because you accidentally skipped one of her events. Currently the only thing you can do is to load a save where her level 2 bar was only half filled (just before hitting brealpoint 4). Or alternatively just wait for the next update this thursday, which should fix this problem.
