Hi there
This is sort of a crucial feature, when someone is working from home they often create enscape materials, but when they arrive in the office the image textures are gone, even with search paths being defined in rhino and so on, this issue is only with the Enscape Material Editor, the rhino materials find the image textures and if Rhino doesn't find the image textures if gives off an error and asks for a new location:
The Enscape Material Editor on the other hand completely screws us over and we need to redo the entire material, including any adjustments we made to the brightness or amounts relating to these images.