VPB Materials access using PiXYZ

Not sure if this is the right place to send something in, however, I’m running into issues setting up the PiXYZ plugin to have access to VPB materials from a VRED file. Currently following the instructions on this page: Access VPB materials | Pixyz Plugin | 2.0.3
I’m having issues because the documentation seems out of date from the current status of the plugin, or I’m just unable to find the correct scripts I am to edit. I’ve found the Menu.cs file already however any changes to it are automatically reverted. I also don’t know how to access the API directly to do step one of this process.

Currently software versions being used are as follows:

Unity: 2022.3.9f1
PiXYZ: 2.0.3

Any advice?