Doubt about Default Material

[Fonte Boa]

Please, someone could explain me if there is a way to alter the Default Material characteristics (diffuse, specular etc colors) so that when i re-start Wings it appears according my last edit?

It seems there is no way to save these definitions as a Preference Subset.
Couldnt the Default Material definitions be added to Preference Subset dialog?
This would add new possibilities to UI personalization:
i was trying to save a subset to make Wings look like Silo - just to record a tutorial - and couldnt end the process because of Default Material.

Thanks in advance.

EDIT:
Example of Silo UI