If you are were on the 1.56 legacy branch and after 1.60 update you've been forced to update to 1.60, since the 1.56 branch doesn't exist anymore, even if you will launch the game you should see a "Legacy" stripe on the top left. If after that you can't roll back to 1.58 even after putting the code and selecting the legacy branch, you can try to go to development branch (which is a branch ahead of the main one), doesn't need to wait the update to end, and put it back on legacy branch for 1.58...
For anyone having trouble
I just wanted to see us playing on 1.60 T-T they made a big visual overhaul that make the game super photorealistic, can't wait to that...