I have Sonar Professional, still learning to use it, its great. Love the TH3 amp sim but its giving me a 15 day trial , now thats expired, I can try again in 40 weeks. Is this just a promo taster or is there a Sonar Professional version that doesn't time out.Thanks all and keep up the good work..
Chris

You need to contact support. TH3 (and THD) works fine here
 

 
 

Hi. As Soundwise says, contact support. I think you might have tried the full version, and not gotten back to the SONAR version. Therefore giving you the demo warning.
You could try to uninstall TH3 in control panel (maybe clean the register afterwards?), reboot. Rollback SONAR in CCC, and update again. Maybe that will sort things. 
All the best.

To restore TH3 Cakewalk try deleting or renaming %appdata%\Overloud\TH3 and reinstall the Boutique FX Suite.

Pleased to report  TH3 - sonar version seems to back..after following various advice given on here..uninstall, rollback..reinstall, seems I did have the full version on trial! -  thanks all!