is there a way to keep your saves when downloading the new version?
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The save files are located in a different folder (C:\Users\(NAME)\AppData\Local\PocketCrystalLeague), so they should be loaded no matter what version you're playing or where the game is located.
Are the files still there? What happens when you launch the newest version? Are you playing on the same computer, or transferred the files into a different one?