Okay, I have opened my box and retrieved the USB Drive and the game-disc CD.
Both media have seemingly the same "Loom.exe" file of 273 MB, which does an auto-install of seemingly just one Loom game folder.
I see:
Loom
--Loom
----901.LFL
----902.LFL
----903.LFL
----904.LFL
----CDDA.SOU
----DISK01.LEC
--Loom.exe
--testapp.exe (which so far seems to just run Loom)
--unins000.dat
--unins000.exe
And after having the game open, I couldn't not recall what button combination may tell what version the game/scumm may be. It also wasn't in the manual. And finally, my google-fu has failed me. I cannot see how to find the version number (unless perhaps I download DREAMM?)