Kineme Network Tools loses key in Preferences Plist

I have been unable to reproduce this bug manually, but it occurs on at least weekly basis (running 24 hours a day). It happens on 20 different machines, usually at the same time (but not always), and I think may be related to intermittent network access (network drops, NetworkTools is activated).

Somehow net.kineme.NetworkTools.plist is losing the "NTKey" entry. I've attached a working .plist and a corrupted one that is missing the NTKey entry. I've changed the extension to .txt to allow attachment.