I see the old files from the standalone installation of the GT3 Challenge update get cleaned up. For instance, in the Steam Workshop folder C:\Program Files (x86)\Steam\steamapps\workshop\content\365960\1596821875 there is only McLaren_720S_GT3_2018_v1.20 and McLaren_720S_GT3_2018_v1.21. McLaren_720S_GT3_2018_v1.01 and McLaren_720S_GT3_2018_v1.05 are no longer there. However on my dedi server I still have all of them installed. Which ones can be uninstalled and deleted ?
Remove the old rfmods and steam will remove the car mods you don't need when you restart the launcher.
Dave, yes, Steam does this on the client computer. This does not happen on the dedi server if manually updated.