Changing the Default Style


I find it easier on the eye to work with a darker background in MoI. This is easy enough to set up and I have made mine the same colour as used in Modo - the other application I am using. I also edit the default style changing the colour from black to white since this makes drawing out objects on a darker background easy and also matches the style used by Modo. However, I can't seem to get MoI to save this change to the default style. Each time I open the program it's set back to black. All my other UI changes are saved and loaded properly. What do I need to do to get MoI to save changes to the default style permanently?

Thanks :-)