Hi Luis - the default style list will come from a template file if you have one specified. Various other per-file settings like the view setup can be set in the same way, and also if you want some kind of default object layout (like some pattern with locked objects in it or whatever) you can also set that up in the template file too.

So to do that set up the styles list how you want the default to be, and then save this off into a 3DM file - put the 3DM file somewhere that you won't delete it later.

Then set that 3DM file as the template, the setting for that is under Options > General > Template file. Set that to the location of the 3DM file that you saved, and then when MoI initially starts up or when you use File > New or when you do "Add default styles", it will be the styles from that particular 3DM file that will be used.

- Michael