This sounded kind of interesting, so I installed it on my htpc, which is running a clean W7 x64 installation, with all available updates installed, MSE installed, and MC installed.
Every time MC starts, it crashes.
After three, it disabled the plugin and let me in.
I went to the plugin and manager and set the plugin to "Show" and immediately received a "Media Center has encountered an error and needs to close" type error.
According to the event logs, the "Faulting Module" goes by the name of "KERNELBASE.dll"
-marko