Sorry that I just saw this.... maybe you've already sorted it.
The FIS file is in the Ucenter program folder (at least on my windows machine). That one threw me for a loop as well.
For what it's worth, our lab has been playing with the Swiftnav Multi lately and my conclusion is that the Multi is very optimistic on claiming that it has RTK Fix where the Ublox seems to be extremely conservative and won't claim Fix unless it has had consistent and stable fix solutions for many MANY seconds. I believe Ublox datasheets say something like 30 seconds where the Swiftnav seems to claim Fix after maybe just 2 seconds.
Either way, I've seen both systems work and totally not work depending on location, if you're standing just right or the alignment of the planets. Neither has been reliable or a state that I would consider "deployable". The only major upside to the Ublox that I've seen is that it doesn't do anything stupid when things aren't working properly. It very smoothly and seemlessly falls back to either single point position solution or RTK Float.
I still really want to play with a ComNavTech but I doubt I'll be able to get funding for that adventure.