

In Take-Two’s words, OpenIV “allows third parties to defeat security features of its software and modify that software in violation Take-Two’s rights”. Modding, OpenIV developer ‘GooD-NTS’ explained that modding has “always been a gray zone”, adding that due to the difficulties involved in going to court, the team behind OpenIV decided to just comply with Take-Two’s C&D notice. OpenIV has been around for years and is described as “the ultimate modding tool” for not just GTA V, but GTA IV and Max Payne 3 as well. OpenIV is the latest, leading to the modding tool being taken offline, after being in development for almost ten years. Since Grand Theft Auto V’s launch, Take-Two has been making a habit of policing the modding scene and has sent legal notices to several developers. If you didn't edit any stock files (Ex, you just added files in the scripts folder and places like that), then deleting the added files would work to restore, but it sounds like you edited some stock GTA V files, so you would have to reinstall.It looks like Take-Two and Rockstar are still keeping a close eye on the GTA V modding community as this week, the devs behind the widely used OpenIV mod tool received a cease and desist letter. Also make sure to delete any external ASI loader like ScriptHookV or ScriptHookDotNet which will crash your game before entering online. When you want to return to the clean GTA V, just go back into openIV, go back to 'tools > ASI Manager' and click uninstall for all 3.

So basically when it launches the game, instead of getting car models from: Grand Theft Auto V/./././vehcles.rpf, it would get them from Grand Theft Auto V/mods/./././vehicles.rpf. This will put that file in the mods folder of GTA V, which will be loaded by OpenIV when you start the game. When you go to edit any RPF or important file, or you go to replace files that were included with the clean game, right click on the item you are going to edit/replace and click "add to mods folder".

Make sure you install all 3 items by clicking "install" next to each one

Open OpenIV and install the ASI Loader and such under 'tools > ASI Manager'. There's really no way to fix it now unless you reinstall the game, but in the future, when installing mods to GTA V, follow these steps:
