Hello,
I have got hold off a second GDEMU for my other Dreamcast that did have the USB GDROM issue.
It's working great and I'm having no problems at all with it.
Anyway I have notice that someone as posted a link to a FW update from the guy that makes USB GDROM.
I still never had any reply from the guy. From the last email I sent him with the video.
Anyway I'm going to give that FW update a go and see if it may fix the issue I was having with the menu, controller going dead when clicking on a game.
It was very much freezing the screen up all the time.
I will give it ago and get back.
Thank you to the person that as posted the link.