It was totally my fault, but I clicked the wrong close X in the upper right corner in the middle of a QSO and closed VarAC. I thought I was closing Chrome after looking something up in the middle of a QSO. I have done this a couple of times in the last few weeks.
FLDIGI has an option to require verification that you really want to close the app. For this ham handed user, that extra step would be welcome.
Thank you for your feature request submission.
To my opinion, as 99.9% of the close attempts are deliberate, it will be a feature that will only interfere with the user experience rather then providing additional value.
It happened to me also once... maybe twice in the past 3 years... but overall in over 1000 QSOs - that is an overkill of a problem not really exists.
Lets hear some more thoughts before I make another call on this.
73s.
Irad