Tried to select a TV show to watch, after highlighting the show and pressing OK on the remote got a message that addin Recorded TV HD is not responding. Selected close but that had no effect, had to kill ehshell.exe in task manager to get out of it.
The only thing in the event log relating to this is:
Fault bucket , type 0
Event Name: CLR20r3
Response: Not available
Cab Id: 0
If for some reason Media Center is unable to play the video it may lock up like that. I've had an issue in the past where my HDMI handshake has an issue and thinks there is no audio device/output. When that is the case my addin will freeze up when calling Media Center's PlayMedia command because Media Center isn't able to play the video without a sound device. Could that have been the case? Or maybe something similar?
The latest alpha version might help. I had added a bunch of if statements to make sure that the addin is currently visible when doing certain actions, but I realized that those checks will randomly take more time than desired and may cause the addin to show the not responding error or just slow things down. I don't know for sure if that is the problem you are seeing. Can you try out the latest alpha version?
You can sign up to be automatically notified of alpha version inside of Recorded TV HD's settings inside of MC or you can download and install it manually.