Failed to activate Freefilesync donation edition with linux WSL2

[cedb76]

Hello,
After donation , I have installed Freefilesync donation edition on both windows 10 on my laptop and also on linux WSL2 distribution ( Ubuntu 20.04 ) on the same laptop.
I have used a few times FreeFilesync donation edition successfully both on windows 10 and on linux WSL2.
Nevertheless, today I can't use it anymore on WSL2 because I would have installed Freefilesync donation edition on 4 devices, instead of a maximum of 3 devices.
Actually, I have installed it just on one laptop, both on windows 10 and on linux ubuntu 20.04 WSL2.
When I check at this addrress:
https://freefilesync.org/thank-you.php...
why it is said that freefilesync is installed 4 times, Ubuntu 20.04 gets listed 3 times instead of just one time.
Does someone knows how to fix this bug ?
Thanks

[Zenju]

Maybe the network card MAC addresses are unstable on WSL2? This could explain the symptoms.

You can check with ip a