Which version of MC are you running? Windows MC24.0.56 64bit?
Which model of HDHomerun do you have?
Have you configured the SiliconDust software to run the HDHomerun in JRiver mode? (I don't have one, but I believe that is a setting that is important.)
Searching the forum would find lots of discussions, and links to the Wiki for TV setup. Or you could turn on logging in MC and collect a log, which should show what happened during the crash.