Fix for fucked up ropes once ported L4D models?

I know there is one, I remember reading about it.

Because I ported my L4D models into Episode 2 and GMod, it’s fucked up the rope(s).

Anyone know how I can fix it/where I can get a fix?

Thanks.

I think I read to delete the materials\cables folder.

Or change the shaders to “Cable”.