So, I have had this problem for a few weeks now, and have tried very hard to fix it. I just re-installed GTA and Im still having the same problem. When I launch RagePluginHook, it will launch the game normally without Rage. Then when I exit the game, It says "RagePluginHook gtavlauncher.exe failed to start". I tried to launch just the gtavlauncher, but it gives me a code 115. I have even tried using backed up game versions, and reinstalling the game all together, and nothing has worked. Right now I only have Rage and ScripthookV installed. I am using the most recent Rage and GTA, and I have Windows 8.1. Thanks!