Tried the following - Steam does not add CD-keys for Advanced Edition automatically. To add the CD-keys, go to steamapps/compatdata/223850/pfx/user.reg and search for:

MINE SHOWED AS ~ .STEAM/STEAM/STEAMAPPS/COMPATDATA/0/PFX/USER.REG

[Software\UL\3DMark] #time=1d85fd1e4952a78 "InstallId"="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"

Add:

"KeyCode"="3DM-ICF-XXXX-XXXX-XXXX-XXXX"

Replace placeholders with your keys.

I had NO [Software\UL\3DMark] 1651680809 in my user.reg

so tried adding it -

[Software\UL\3DMark] 1651680809 #time=1d85fd1e4952a78 "InstallId"="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" "KeyCode"=""

at the end of the file but that did nothing.

It's dead Jim as it stands