Alfred Neswadba suggested the following idea in the Elite forum:
...have you tried to pass the paths (for the trusted paths) directly into the registry?
It is to be found for full AutoCAD (in my German version with English language pack and my profile):
HKCU/Software/Autodesk/AutoCAD/R19.1/ACAD-D0001:409/Profiles/AN_DevNET/Variables/TRUSTEDPATHS
Also the variable SECURELOAD is stored there!
It's worth a shot as long as your fully confident working directly in the Registry of course. And it's something to investigate while you wait to hear something else from Autodesk. Let us know what you find and if it works.
Dave.
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Dave Hein, P.E.