[dsego]

Add a one line comment stating that it was edited by monodraw.

[makeitdouble]

Looks like Monodraw a mac only BTW. That should be fine if macs are mandatory for all the devs on a project, but it would otherwise create a kinda weird situation.

[bayindirh]

Since they're text files, you can also say "Please copy to a ASCII diagram editor and update there (e.g. Monodraw, asciiflow, etc.)".