How to Reinstall/update Simple Trainer without losing saved cars/character skins?

Hello everyone, I tried asking this question over on GTAVMods website but no one has answered. I recently installed GTAV Redux but didn't like it so I uninstalled it by deleting my mods folder. I then made another mods folder and recopied the update and x64 folder back into it. And reinstalled my other mods. But now I noticed that since uninstalling Redux that a bunch of cars that I spawn from Simple Trainer are disappearing after a few seconds, not all cars, but a number of them are. SO I was thinking of reinstalling or updating Simple Trainer (I have an older version) but I don't want to lose any of my saved cars or character skins. Is there a way to do this?

Quote from Wolfrunner86

copy the trainerv.ini from the main game directory

thanks, gonna do this later today and I'll update you .

It worked, I was able to keep my cars and reinstalling/updating Simple Trainer solved the problem with cars disappearing.