Hi,
Please, close 3DS Max and delete the following files from the Max root folder:
RCEdit.dll, RailCloneVRay50.dll, RailCloneVRay60.dll
In latest releases, RailClone for Max 2022 and above is installed at C:\ProgramData\Autodesk\ApplicationPlugins, not in the Max folder.
These files are causing a conflict with the correct files at 'ApplicationPlugins'.