I uninstalled the Q1 version, then had to research how to uninstall the Q4 version, since the Remove button didn't appear in Add/Remove Programs. I found instructions to do that here
, but after following the instructions and then reinstalling the Q1 version, the Q4 assemblies are still in the GAC, and are what is getting used in my application. So I uninstalled the 2.x versions from the GAC, and updated the references in VS. I had to then fight through some issues with getting my form to open in the Designer, but I finally got that to work.
So everything is working now, but that was a real pain. Thanks for your help.
Also, did you see that the documentation about the GroupElement.ExpandGroup is incorrect?