Plug in worked great, then out of nowhere it didn't. I'd store passwords exactly as instructed, click OK, and they'd stick. Cliked Update, and they disappeared. No new code, plugins, etc., since installing so that negates conflicts, because it worked without a hitch for a while.
No response to support question after a week.
"Never give a customer a reason, or the time, to go somewhere else."
In this case, the developer did both.