What worked for me was before I install RDE - I made a separate GTA V main file (rename the original file to (mods)) and use the new GTA V main file - just for the RDE stuff (cars, uniforms, whatever) and use that. And then when I want to stop playing RDE - I just do a switch-a-roo - make my GTA V-Mods file just GTA V again, and rename my RDE one - GTA V - RDE.