Good day Mark. I've changed the whole stuff, from computer to simulator. Now my rig is under W10 and P3Dv5.1, and, of course, my AviaServer licenses expired. The steps I took were the following:

1. FEB-10-2021: Request license via "Send Request Directly". In less than 5 minutes, the 747 CDU license arrived in my e-mail.
2. Installed the new license in the AivlaServer folder. Again, I received a message saying "...one my licenses is no longer valid". Well, that's strange, so...
3. I emailed Mark Foti with the problem, attaching the log file. I received an automatic response e-mail telling me to request a new license and bla-bla-bla. Until today FEB-13-2021 I did not received real person support.
4. I also filled the support form in the Aviaworx site. Until now, silence in the radio.
5. I tried again to send a request for a new license, and after completing and sending the request form I received a message "EMAIL FAILED TO SEND".

What now? Did we lost contact with support?

Thanks for your attention.

Heron,

you are probably still running an old version - make sure you update to the latest version.

I also sent you an email - check your spam folder if you didn't receive it.

The request system is working correctly. If you are still experiencing issues, try disabling firewall and antivirus software.

Mark,

Solved. I cleaned the server folder and retried an Aviaserver download, immediately moving there the new license. Then it worked.

I think that at the first time, when I received the no valid licenses message, something happened into the folder and I could no longer re-validate the license nor request new licenses.

The emails I received from you were two: one with the new license and the other with the automatic response of my support request. I always look in my spam box and your emails never got there.

Anyway, thanks a lot for your support.