I do not understand how there can be this problem, I'm sorry! You remember to unzip the "Armco" folder in Gp3jamsH folder of your Gp3, and unzip the jip files of "genjam" folder in Gp3jams \ genjam folder of your Gp3. Unzip the other folders of "gp3jams" (san3jams, jaca80, etc.) in the gp3jams folder of your gp3. Also some circuits load in "debug mode". Finally, to me, for example, to load Silverstone before I open a practice session and only after charging directly in "quick race". The files contained in the folder jam "fix" serve in case you play with GP3 1.13 (that shows the famous square blacks).