I believe that you are right. I haven't actually held a fr645, but given the button count it should not be a touch screen. I'll get something filed so that this is fixed immediately.
If you want a quick workaround, you can open bin/devices.xml in a text editor and make a small tweak. If you search for fr645.png and fr645m.png, you should find a line like this..
<display id="TOUCH" shape="round">
Remove the text id="TOUCH" for each device entry and save the file. When you restart the sim, the issue should be fixed.
