Thank you for this new information. No, the trial is a full version without limitation other than the time you have to use it. Purchase just unlocks the key and removes the time limit.
Sounds like you could connect at one point. That’s good. Right-click the ‘Devices’ button in the ‘Laser’ window will reset the connection, but you may be dealing with a bigger issue. Read this post from Ortur directly about the Service Notice - Grounding Full Documentation