It's unlikely I'd notice anything else amiss in the Options, but I'm happy to help test!
Thanks for pointing out the updated template file. I've seen the template file mentioned a lot on this forum but never known what it's purpose is.
I looked around it as thoroughly as I could, but bear in mind I'm unfamiliar with a lot of MAME and QMC2 functionality. I looked at as many different types of Options, settings and controls as I could find, and nothing looked wrong.
The whole exercise was a good way for me to learn a little more about MAME/QMC2. In fact, I ended up with one or two questions, but I'll leave those for another day.
Good work and thanks