I am not a member of the HistorX team but I know that this problem is fairly common.
There is certainly a way around the problem but I don't know the solution myself.
This forum is not as active (ATM) as it once was. You may be able to contact the team via their Facebook page.
Failing that, try asking on HistorX forums at some of the online racing clubs.
I'm confident that you'll find a solution soon.