You go to down-chorus/game/saves and you copy your saves and past them somewhere else, then you download the new version, you launch it and make a random save so it creates save folder, then you copy the previous saves you stored and put them in the new game/save folder, and you have it !
sometimes the saves are already on roaming folder so you don't even have to do this. Enjoy !
I rejected going with Puro and instead hop into the wagon, I finished the mini game but when the cut scene came (entring the wall) the game froze on a screen (the BGM still playing), I couldn't move since there isn't even a character, so is this route WIP or did I glitch into the wall.