Hi and welcome to the Bome community!
Oh no, this is not good. We have not seen this before. Are you on Windows or Mac? What version? Do any other MIDI applications crash when the port is open? Are you connected with USB or MIDI?
What version of Bome MIDI Translator Pro are you using?
Could you share your Bome MIDI Translator Pro project file? Does it crash when using any project or just a particular one?
See this posting for instructions on sending a crash dump.
Steve Caldwell
Bome Customer Care
Also available for paid consulting services: bome@sniz.biz