Update SW2018 model in KS9 pro messes materials around!

[Phillip]

Hi Everyone -
Not a super professional user of Keyshot - still learning. However, I have a large part file that I have added to KS 9 pro and assigned many materials/textures to.
The SW2018 part file gets updated every now and then, but for some reason, when I import it to KS, then all the materials switch around. It takes hrs fixing... I don't use the plugin since I don't see that idea working so well.
I have looked around in this forum and can't seem to find an answer that works.
Any ideas are greatly appreciated.
Thanks
Phillip