Hi Will, yes setting the actual file itself to read only should work.

But not very convenient if you sometimes want to edit the file but most of the time not.

One other new thing for this in the next v2 beta is the concept of opening a "Template" file which you will be able to do by a right-click on Open.

That will open the file but set the current file name to be blank, so you will get prompted for a new name when you go to save. It's pretty similar to the "read only" option.

There is also a new option for choosing a startup template file, which is a file that can be loaded as a template when MoI first starts, or when you do a File/New. If you have some things that you always want to have set up when you start a new model, you can put them in a template file and set it as the startup template.

- Michael