I tried playing the game with the "realistic mod-pack" and now when the game is loading, doesn't StretchySRB. Actually, the game itself doesn't load because of this mod, I still need to remove the mod to see if it's the real problem. EDIT: The game loaded without StretchySRB, but I think if I clicked the "start game" button, there would be no stock parts, WHY??? Because I was playing the game without any realism mods, and when I decided to "re-start" the game, I deleted EVERYTHING in the GameData folder, including the game's parts,flags,etc. Sorry about saying it was your mod, it was only me with my dumb way to delete all the mods