Rev disappears when PlugIn Settings is exited

[Jon]

Recently, the following happens, repeatedly.

I run Rev, open the Plugin Settings facility, close it, and then Rev 
immediately disappears.  Sometimes the disappearing act happens only 
after I click on Rev, then on something else, and then back on Rev.  In 
any event, Rev has become totally unreliable.  This is with none of my 
own stacks open yet!

I assume some Plugin is causing a problem.  I tried to inspect each one, 
using the drop down list called Plugin on the Plugin Settings window.  
This turns out to be a pretty frustrating experience, for a number of 
reasons.  One is that the drop down list only shows perhaps five 
Plugins, while I have 26 or so available.  Another is that the position 
in the list is not "remembered", so one has to start from the top and 
drill down to the Plugin one is trying to explore next, rather than just 
pressing the <down> key.  Finally, the drop down list sits on top of the 
Send Messages To Plugin box, so I have clicked in that box accidentally 
more than once.  At this point, I have no idea if the contents of this 
box are correct or not, so maybe that has contributed to the problem.

I can remove all of the Plugins from the Plugin directory and then 
replace them one at a time.  Short of that, any thoughts or recommendations?

:)

Jon