Is there an easy way to downgrade the game to 3.13? When i try to install 3.13 when i already have 3.17 I get the message that i have to uninstall that first...

Is there an easy way to downgrade the game to 3.13? When i try to install 3.13 when i already have 3.17 I get the message that i have to uninstall that first...The safest thing to do is uninstall, delete any remaining files, reinstall and repatch.