Dani, I may have confused you.
You do not need to edit the add-ons.cfg.
In your Documents - Prepar3D Add-ons folder, move the whole UTLive folder out onto your desktop, then try P3D again.
If P3D runs normally then UT Live is the problem, if it is still running as a background process, then move the whole UT Live folder back to Documents - Prepar3D Add-ons folder.