Yes.
Are you REALLY, REALLY sure?

Maybe two warnings would be nice but an easy way to reverse the deletion would be even better.

I find the editing of column headings a little troublesome. I don't often change the display so I single click, then because it seems to be responding slowly, I keep clicking!

I've had Adagio for a very long time and this is the first time I've mistakenly deleted a batch and now I have a fix so I'm a happy camper!