When going from desktop to laptop I lose all the material color assignments. Is there any way to 'save' them so that I do not have to start from scratch on the laptop?
What you are asking is not clear.
The only setting fo o2c I use is cyan transparentised. It comes up on every computer without even thinking that I might need it.
The o2c settings are stored in the file.
If you take the file across to a laptop, those settings go with it. If you cannot see what you expect, I think it is a hardware problem.
If you are referring to standard settings, all you need do is have them in a default file and ensure that that file is common to all your computers.