Yes, I have verified. We have been having this problem since the update. Do you know of a way to have more than one admin and diag instance installed on the same pc?
I run some of the "old" software in a VirtualBox installation of Windows XP, it works fine... VirtualBox and a Windows XP machine are my savior for a lot of things.
I don't know if you are doing this, but do NOT try to install the old db studio software with the new MSAD application installed, it will have bad consequences. Make sure you are using the correct plug-ins only.
If you are still having issues, I recommend the same as TE, uninstall all programs and plugins, and reinstall as needed.