Starting with PBP: how to restart with PBP today

[Acetronics2]

I tried to install the MicroCode Studio Plus 5.0 license on the Windows 11 NotBook, purchased in 2014, but I get the error "the product key entered has expired".
The old installation, on Windows XP, still works.
Any suggestions to recover it?

Melabs still sells licences ... so, you could drop a line there.

But looks there's only one installation per code ... ( I got the same screen as you, trying to install MCSP on my XP computer )

BTW, in my " codes box " I found two different bills from D.Barker ; one bought in 2013 and one in 2018 ... so there must be an update circa 2018 !!!

Alain