selectively remove tag-filename formulas?

I've accumulated quite a few tag-filename and filename-tag formulas. Many were one-offs for particular albums.
Is there any way I can selectively remove these?
They look to be in %userprofile%\application data\mp3tag\mp3tag.cfg, which looks to be SQLite, so I can't just edit it.
Failing selective clearing, is there a way I can clear them all, shout of uninstall/reinstall? I've got a number of actions I'd prefer not to mess up.

You can use [Shift+Del] on a single item or the placeholder list button |>| has a "Remove from history" item.