Hi, every time I open Draft sight a product activation key appears in a Solid works box asking for my Draftsight license key. Then it says deactivate from other system but I am the only person using this licence. Activation failed appears after that so I currently can't open Draftsight or any drawings. I've rung solidworks techincal team and they can't help and Draftsight don't seem to have a technical support phone number. Any Suggestions?