When registering TracerPlus and TracerPlus Connect, you have to be aware of 3 main points. A lot of people miss the 3rd one and it will still be running in trial mode
1. TracerPlus *on the device* must be registered.
2. TracerPlus Connect *on the PC* must be registered.
3. The Device ID must be listed/assigned to the PC doing the sync with TP Connect. This is accomplished via Tools-->Registration menu option. You will see the ability to assign a device ID to your allocated license count.