even though i've goofed up like this also, i'd prefer the current method wasnt changed. this is a 'user error' and when programmers start trying to correct user errors with code, we tend to get goofy programs.
i find that making a duplicate of the default tends to help this situation out. just make a copy of the preset somewhere down in your presets and if you wipe the default (like i did yesterday), you've got a backup.
what i'd rather see is a warning message when you hit 'save filter' that prompts you to save as another name for the filter so you dont overwrite an existing whole filter from the editor. (and i think this was mentioned by someone else months ago and made it onto the list).
If wishes were horses... there'd be a whole lot of horse crap to clean up!
Craig