Hey guys. I know how to restore ur old save.
So here we go:
Find old and new save folders by paths
Old save folder: C:\Users\*urusername*\AppData\Local\Subverse\Saved\SaveGames
New save folder: C:\Users\*urusername*\AppData\Roaming\Goldberg SteamEmu Saves\1034140\remote
Just copy the file "Subverse Save Game Slot 1.sav" from old to new folder
Then just rename it to "SubverseSaveGameSlot2" (necessarily delete ".sav" also). Better don`t delete or make backup ur new version savefile
Done! Just launch game and get some fun, but be awared, it may bugged some new content