Because my pc 1 is install the rfactor,
Other pc 2,also use same ACTIVATION CODE,
So,can not together in the interent play,
Now,i just buy rfactor again,
So,How to use the new ACTIVATION CODE on pc 1 ?
Try deleting the Trymedia folder in PC1. You will find it inside C:\ProgramData or whatever drive you have rFactor installed. In case you can't see this folder, it is hidden by default. Open Control Panel/Folder Options and check the box "Show hidden folders" or something like that. Next time rFactor will run as a trial and you can insert the new code.