I am trying to get the me3 upgrade onto a usb stick that Leica just released addressing the satellite tracking issue. I am trying to figure out the difference between the 3.611 and the 3.611s1. When I click on 3.611 it offers a compressed zip to the flash drive. When I click on the 3.611s1 it opens up a new tab that is a black screen. Is the 3.611 all I need or ?? Thanks for any help you can offer! I tried following the link from this thread and the same thing happened. http://talk.newagtalk.com/forums/thread-view.asp?tid=627833&posts=11&highlight=leica&highlightmode=1#M5271536