Plugin Host list corrupted

I've read that to use debugging functionality from VS(2013), I need to set the Command to the plugin host (which I've compiled already).

Now, I've made a synth VST that compiled, but gave "failed to initialise" in it (and another serious host too). The problem is, I can't clear these red items from the Juce Plugin Host list.

Where does the PH save the XML that I might delete so that I can try to debug again?

FYI there was actually a bug in the listbox code that deletes those items from the list, which I just fixed about an hour ago...