Questions
Do I need to remove FFB-Bridge Free?
No. Free and Pro are separate apps with their own settings. At its first start, Pro copies your Free settings and profiles, and Free itself stays unchanged. Run one at a time: quit Free before you start Pro, so only one of them drives your hardware.
How do I add a second or third computer?
Install Pro there, choose Try Pro free for 14 days and enter the same email address. The trial keeps its end date.
Is there a trial key?
No. You start and confirm the trial by email. If you buy Pro, the purchase email contains your licence key.
The confirmation email does not arrive.
Check your spam folder. The link works for 60 minutes. Choose Send again in Pro for a new one.