Hello Organmad,
The Icon that you get a glympse of is a blue circle with a square in it!
That's not part of Hauptwerk, so I guess it's something to do with your MIDI or audio device drivers, which Hauptwerk queries on launch.
Nothing at all changed in Hauptwerk relating to MIDI devices in v3.30, so I think that the fact that you're having a problem now, after recently updating Hauptwerk to v3.30, is probably coincidental.
Or did you perhaps select the option for 64-bit Hauptwerk in the installer this time, but not with your previous version? Perhaps your MIDI drivers aren't fully compatible with native 64-bit software (most are, but not all).
You could also try seeing if your MIDI ports are visible in other applications (e.g. MIDI-OX).
Best regards, Martin.
Hauptwerk software designer/developer, Milan Digital Audio.