I made a track up from that user track drum guide and it worked good, but I had to highlight the last 4 bars and regenerate the ending a few times until it filled it in.

You put the part markers where the fills are.
Wherever you have an ending, you set it in the Bar settings.
They have still to fix the Intros, it would be in the bar setting "2 bar intro starts @ this bar"
I left the time sig on default 4/4

To try it just generate up the wav drums with real band for now.
I set it to 36 bars and check 2 bar ending.
I set bar 37 to blue part marker, after it generated I copied the last 4 bars to bar 17 thus creating a blue ending.
I then changed bar 37 to green, highlighted the last 4 bars and regenerated drums, thus giving me a green ending.
I set bar settings ending @ 17 & 37.
I unchecked 2 bar ending and set bars to 40.
I saved with "Drums" in the folder & filename.
I chose SGU type and chose the real drum track as the wav.