I thought I had posted this here, but I guess it was the other thread. For those looking for FMS / UNS-1 instructions, this video is helpful. The UNS-1 modeled by Working Title seems closer to this one than the one in the Just Flight planes.
The easiest way to enter a flight plan is 1) FPL->MENU: Enter Departure data; 2) FPL->MENU: Enter Arrival data; 3) FPL: Select the “NO LINK” line, and work enter your FINAL waypoint before your STAR/arrival runway. After this, continue working BACKWARDS through your waypoints until you enter the last one after your SID/runway. Each time you enter a waypoint, first select the line that the waypoint precedes; the waypoint will be entered above that line. It’s a bit odd but it works fine once you get the hang of it.