"Damn you, Blake!"
Am I the only one that ever got Sol to work in content manager preview 74!? Mind you, I always install mods manually.
The only files the original and new version share are in the system\ folder, everything else is moved because the original folder names caused SRS issues. So ideally you would fully uninstall the old one and install the new but just deleting the car folder and moving content/system/extension folders into your steam/assettocorsa folder should work.Is the new version just packed data anyway?