Hi, Jared, I've just tried your suggestion, but it only helped the first time I ran it: I then had to reboot, due to a software update, and when I tried again, 10/10 tries produced the icon with what looks like the input field only, and no main window, as before.
I tried moving it to another non-desktop directory (C:\Utils), but that didn't help - it used to live here.
I went back to trying running direct from the download archive, first time failed 3 attempts, so I tried another copy of the archive, and it ran first time from there.
Hard to see a pattern, but running from a new location seems to increase the chances of success.
I did try firing it up under the VS 2013 community edition debugger once, a while back, and it gave some message about a .Net fault, but I didn't keep the details.