I recently upgraded my computer and obviously want to install Draftsight on it. I purchased DraftSight Professional and have reference number and license key for DraftSight Professional and is installed on the existing PC. I tried to activate DraftSight however it states I have 3 activations!? I only have one PC with DraftSight Professional. How do I deactivate the other activations?   Please advise and thank you for your attention in this matter.