If you are unable to register the free trial, there are 2 things that may have caused this.
1,You may have installed/registered DriveHUD on that system before
2, If you are sure that, the system you are using hasn’t installed or registered the free trial before, this maybe a MAC address issue.
I suggest sending your drivehud.log file located in this folder to support so we can check this for you.
C:\Program Files (x86)\Ace Poker Solutions\DriveHUD 2\Logs