Try to activate the trainer (F1), while on the desktop, and not in the game (the game is minimized). It helped me to activate the cr option a third time, maybe just a coincidence, but try. Reboot the PC and delete the temp folder from the windows folder.
Then proceed:
1. Run the game;
2. get in the car;
3. minimize the game and run the trainer;
4. without returning to the game, set the value of the credits you want to receive then activate the trainer by pressing F1;
5. return to the game for a couple of minutes, gain points of technique using jumping NUM 0;
6. stop, wait for the points to be credited, then press NUM 4, wait about a second, press ESC, after hearing deactivated, wait another couple of seconds and press NUM 5, press ESC again to return to the game;
7. check balance.
Maybe this is just a coincidence, but it helped me. I hope to help you.
[Edited by Sledge_us, 10/13/2018 3:10:16 PM]
Thanks for your help but setting credits crashes the game. Problem isn't the procedure, it's the game crashing instead of imputing credits.