I  received an email inviting me to upgrade my Fences 4 to Fences 5 at no additional cost. I downloaded the upgrade, installed it and restarted my computer as required.  I proceeded to activate the upgrade. My license key: xxxxxxx (please do not post your license keys in public) was rejected. I tried to use  My Account but that also did not work for me. Could I request that you send me a listing of all my Stardock license keys? It may be that I need a new key but Fences 4 is working just fine.  If it ain't broke don't fix it is my thinking.