Please make a download available for us all WHICH WORKS, and which will not STOP WORKING in future from bugs in your activation system.
We've all paid a significant amount of money to use this software, and it's totally unacceptable that a year later it stops working.
Do not send certificate or other instructions - my internet and my PC (Mac Pro) work JUST FINE - you need to fix your software so that it doesn't rely on obscure things outside of your control.