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Sorry, when checking again I realized that I may have been mixing up two registration numbers. Apparently my administration is not in good order, and it's the last registration number that I've lost. So I think I'm the only one to blame. From now on I'll either run Amadeus Pro on my old computer, or...

Thank you for your quick answer. I followed your advise and it worked, but when trying to register I was told that my license key was not valid for version 2.x . Then I was advised to switch back to version 1.x - but that one was refused as my computer & OS are to new. In other words, I fall bet...

On my old iMac (latest version 10.13.6), I've been using Amadeus Pro 2.0.1 for years without any problem. Recently, I've bought a brand new iMac, with version 11.6. When I try to install Amadeus Pro on the new iMac (luckily I wrote the register number down) it is refused. The comment says: "The...