[Zubersoft]

If you are editing a group, the "Remove" option removes the songs from that group. If you tap the three dots at the top right, there is a "Delete Songs from Library" option which permanently deletes them. I set it up this way as users were deleting songs from their groups on accident and then getting upset about it (even though there was a confirmation dialog). 

There isn't an undo option at the moment as supporting that is very complicated, as it would involve rolling back changes in the database (meaning I have to store snapshots of the database, or lists of instructions to reverse every change), and unless I set up a "recycle bin" of sorts with song files, I wouldn't be able to remove those either, but then I'd have to manage when to empty that "recycle bin". I just really don't want to mess with all that unless there is a huge demand for it. You can revert your database to an earlier version as mentioned by Geoff though.

itsme - Unfortunately, Microsoft imposes a maximum dropdown height for comboboxes, and I can't override that as far as I can tell. It's something they set up in code that can't be overriden. I am already specifying an extremely large maximum height for the dropdown, and their code must ignore it if it's over a certain value.

Mike