Just dug that out – in admin.js (329) you attach a JS function to the .backup-options selector. The trouble is there is a
<div> element with the same class present in the WP Migrate DB Pro “Configure Profile” screen (when Pull or Push is selected).
As a result, when I open the WPMDB screen and click on that div, there is a JS error in the console (“Uncaught TypeError: Cannot read property ‘slug’ of undefined”) and the div is set to display:none => so I cannot change the relevant options in that div (they refer to backing up the DB while doing the migration).
I cannot write to the WPMDB dev since the license is not mine and the person who owns it is hard to find … long story 🙂 Could you please check and contact him if there is a need to?
Thank you in advance!