nice that it never uninstalls itself
The plug-in installs a fresh copy of itself every time you start a session, but it never removes itself afterthe fact. Reading about this my initial reaction was to think of all the machines that watched a single webinar years ago and are now vulnerable and will remain so probably indefinitely.
When I started running across them years ago I was worried about something like this, and I have been serially wiping it of the machines in our business office and HR department for years. It will be interesting to see the browser fingerprint data on the plugin before and after this disclosure.