Old PC died, New PC, copied password files but they aren't recognized

I’m helping a friend that had her PC die (CPU issue). I am giving her an old desktop I have with a clean Windows install (I tried booting the old drive on it first, no go, the machines are too different). She has a subscription to Premier and I’ve installed and activated the password function. There was no way to point it to her old password files on the old drive, c:\user\userid\Appdata\Local\Avast Software\APM\Userid\kv*.db and pam.db, so I used a boot disk to be able to copy those files to the new PC, same path except I changed the Userid to the one on the new machine. And of course it doesn’t see them, just wants me to start over.

So, how do I get it to recognize the password files? I asked and she said she didn’t have a Master Password.

Windows 10 Pro 20H2
AMD A10 7870k/8GB
Avast Premium Security 21.3.2459 (build 21.3.6164.660
UI Version 1.0.616

Hi,

Copying the old file to the new PC will not work.
Please ask your friend to contact us at https://support.avast.com/en-ww/contact/paid and we can look further into this issue.

“Copying the old file to the new PC will not work.”

I figured it was a low probability but worth a shot. I’ll tell her submit the request when I deliver the machine.