Well maybe I am missing something here. All I can do is select ICOM. I can not select anything else except the port. The last box always says "Detect." So how do you select a driver or is that what I do when I select ICOM?
You need to re-download and re-install today's build (as of 0646 PDT)
The automated build system stopped pulling changes into the windows installer build a couple of days ago, which means the (recent) change to let you force a specific driver model hasn't been making it into the windows build. I realized and fixed that this morning after you said that you didn't see any option other than detect. So, go re-download the 0315 build and try it again.
I don't think that choosing the driver manually is going to matter for you, but it's worth a shot.