Hi! Sorry for the long title, but it’s hard to one-hit the nail here.
For help on troubleshooting purposes, please add a list to the docs, which lists all files that are created or affected by VRay in the ENU folder of 3dsmax and all of its subfolders.
Also a list of all files (those from native 3dsmax) in that folder, which are not created or manipulated by VRay, but affect VRay when operating.
I mean this folder:
C:\Users\%username%\AppData\Local\Autodesk\3dsMax\ 20XX - 64bit\ENU
Thank you and greetings!
I hope that this post will ever be seen, since this forum is waaaaaay down the page 
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Hi, V-Ray is a plugin from 3ds Max’s perspective and we’re only bound to write our specific configurations in a designated directory such as: C:\Users\username\AppData\Local\Autodesk\3dsMax\2022 - 64bit\ENU\en-US\plugcfg\ The files are easy to spot as their names start with “vray” and it’s kind of obligatory as we don’t want other plugins’s files messed up for/by V-Ray.
As for the other files we cannot make an extensive list, because they are entirely controlled through 3ds Max and may change between releases/updates. Even if we initiate the updates it’s up to 3ds Max’s internal implementation how and where the changes are stored. E.g. registering a button on the toolbar is stored in 3ds Max’s configuration, totally transparent to V-Ray. Also as such it may not be legal as it may be falling into reverse engineering activities.
Best regards,
Alexander