[GraemeJ]

Actually, I do include the key in the filename, as it makes it quick to find the tune/arrangement for a specific singer. I often include the singers name as well (where possible) as it speeds up building a setlist for that particular person.

I think we all tailor our use of MS to suit our particular needs and I can see where your request could be of use in some circumstances. Maybe Mike could include that as an option but, at the moment, I think he's doing his very best to get v5 rolled out.