Welcome to the site and thank you for such kind words -- I'm glad you like the program. It's only because of generous people like you who have donated that the program exists.
Ok, so first, this is a good idea. There are 2 ways that it sort of already exists, but perhaps it can be improved.
First, all of the drawing object settings can be saved and recalled easily from the Object Presets menu on the main menu. This is for things like arrow styles, colors of objects, etc.
Second, you can actually save and recall your entire settings (as you seem to be requesting), from the menu in the OPTIONS dialog. This is slightly more inconvenient to navigate to and to select from, but it should work. The one thing I noticed when i just checked it out is that it seems to default to the Program Files directory of the program, which is no good, since you shouldnt be saving your settings in there. So I need to fix that.
One option I could add is perhaps an Advanced Tweak option that would let people tell SC that when they save and load from the easy "Object Presets" menu, it should save all settings in there. That would make it especially easy to switch between complete settings sets.