Final Cut Express on new Mac Mini
I have been running FCE on my Mac Mini (bought in 2008) with OS X10.9.5 Mavericks. When the old Mini went bad, I replaced it with a refurbished Mac Mini Model A1347, Part No MD387/LL/A., also running Mavericks 10.9.5. I restored the data from the Time Machine backup. All my applications and files appeared properly. When I now open FCE, the program requests my name, organization and Serial Number. I enter the number from the original materials that came with the software, but the response is "serial number not valid". What can I do next?
Mac mini, OS X Mavericks (10.9.5)