Hi Ziad,
Thanks for your quick reply. Brief correction to my last explanation: It works fine when I click on the toggle slider window (not the color bar). It only crashes now when I try to actually move the toggle. I have not been able to make it crash another way.
I can work around this, but it is annoying. What more details would you like? It is possible that the problem is caused by a dependency on my machine (?) -- and so may be idiopathic to my computer...
-Andy