Hi, you can only use on 1 pc, so you need to deactivate on old pc, and reactivate on new pc.
1. Go to settings, top look for 'about' , this will show your Lic. code. Write it down.
2. Settings page 2, click 'deactivate'
3. Go to new pc. Install software and input above Lic. code when prompted.
Hope this helps...