Bypass Mac-Address protection

[GThreepwood]

Hello
I do not know if this is the right section.
I have a software that uses the MAC address to check if the license is valid.
A checking program by the same manufacturer displays even spoofed addresses correctly but the software itself does not.

Cane someone find a possibility to get around this or find the address that needs to be changed to get around this?
I tried it with a batch file that changes the MAC address, then starts the software and then changes it back but this leaves the demo-mode turned on.

I do not know in what language it is written If you need additional information do not hesitate to ask.