1) No version.txt file? This is so weird! Never seen this before.
2) Yes, this is true that I wrote instructions when I had Scribe on non-MTP FW. However, the FW in question ended up being 5.16.2 (so, non-MTP anyway), so I don’t know what’s wrong here…
3) My current Scribe1 FW 5.17.2 with MTP still allows me to add \system in path (in Windows 10/11 File Explorer). However, the system folder is also just visible in plain sight

Colorsoft must be on 5.18.x, so we will see what changes when such FW ships to Scribe.