I tried that already. I went and made sure that there were 0 fab parts, went into the configuration menu and double-checked any loaded configurations and it was blank "HOWEVER", it has a greyed out fab configuration at the top shown like a 'last used' configuration that it won't let you erase. (A blank drawing shows this as 'none'). So even though there is no configuration loaded in your browser, it still 'thinks' that one is loaded and it won't let you bring in any new fab items. There has got to be a way to clear that item out, but we can't find one.

So once you have ever brought any items in it puts this ghost configuration into your file even if the items are erased, purged, families purged, etc... Your configuration will never reset to 'none'.