slate material library max2013

[voltron7]

Silly maybe, but stuck on this.
Somehow about 40 materials accidentally got saved into one of my libs. So far, it seems the only way to remove them is to select each one, right click and choose "remove from library."
Is there a faster way?! Cannot seem to select more than one at a time...

Thanks in advance.

[Pixelcon]

You can fairly easily maxscript something to clear it out... Shouldnt be more than a few lines of code...