Hi, this issue is unrelated to the update. Any game you sideloaded before February will have the same issue when updated. You can learn more about it at https://help.play.date/games/sideloading/#duplicate-games
To get your save data you’ll have to put your Playdate into data disk mode and copy all files from Data/user.1234.sketch-share-solve/ to Data/user.1234.net.monometric.sketch-share-solve/ where 1234 is your user number.