UPDATE 15/06/2017 1.22am: Grand Theft Auto developer Rockstar Games has responded to OpenIV's removal, claiming that the software could interfere with the game's online modes and that it's working on a solution that will enable fans to still make single-player mods.
"Take-Two's actions were not specifically targeting single player mods. Unfortunately OpenIV enables recent malicious mods that allow harassment of players and interfere with the GTA Online experience for everybody," the developer said in a statement to PC Gamer. "We are working to figure out how we can continue to support the creative community without negatively impacting our players."