Selecting large groups of roms for deletion

[Drakkorcia]

I wanted to know if there is a way to grab large groups of roms. The usual right mouse hold, select a large group, unpress and delete doesn't seem to work in Launchbox. For example, in my MAME set I might want to quickly delete all terminal roms, a foreign region I don't need, etc. The only quick select I know of within Launchbox is Ctrl+A which deletes your entire collection. I have been having to Ctrl+click one by one which is a really pain in the butt when the group your deleting is really large. I selected all the right filters upon import and there's still a lot of junk. Unfortunately, All Killer No Filler isn't right for my collection. Am I missing something?