Upgrade Key not Working

I just paid nearly $50 for 2 renewal license of em Client from v7 to v8.

I got one of them to work. I tried to use the other on another machine and it says the version I’m running (v8) is too new for the license.

What gives?

I hope someone out there can help.

Looking for help here in the forum, about keys, payment, sales, etc, will prove to be useless and a waste of your time. Instead open a support ticket! Good luck!