It could be as easy as a moi.ini search-shortcut to the .exe.

I sucessfully duplicated a moi.ini where i gave it a moi.ini duplicate ex: "shortcut_to_moi.exe" -moi.ini

When i deleted the -moi.ini at the end after the last bracket "." the new files appeared again.
I put the moi.ini directly in the folder of Moi3D to eliminate the newest-files not appear in the menu.
It works for both v4 and v5.

Mvh