Please explain to me how to start to a new game, I can't.
Go on, I will give you £1500 if you can tell me how.
Ok, i will tell you how:
Clear any mod leftovers or anything that doesn't belong, from all game related folders.
If you are unable to do so, due to lacking the necessary skills, you can just delete all game related folders and then reinstall the game.
Do not bother with "verifying game files" or anything like that - that might fix corrupted game files, but it won't get rid of garbage or mod leftovers - which is what often breaks the game.
Now, about those £1500... contact me via PM, where i can give you the account number to where to send the money.
Thank you very much.
