For this version, you need to place an additional configuration file to

ux0:data/moonlight/settings.txt

In that file you write four numbers: stream width, height, FPS and bitrate. So the file might look like this:
1280 720 30 2000

for 1280×720 30 FPS and 2000 kbps bitrate

960 544 60 4000
for 960×544 60 FPS and 4000 kbps bitrate

If you want to use Vita native resolution (960×544) you need to go to NVIDIA control panel => change resolution and add the resolution manually. (Customize=>Create custom resolution) Also, some games might need additional settings to stream 960×544 (for example, for Portal 2 I had to add -width 960 -height 544 command line options).

Use front touchscreen for mouse movements and actions:

left click – one finger tap
right click – two finger tap
pointer move – one finger swipe
scroll – two finger swipe
Use back touchscreen for L2/R2/L3/R3. The zone mappings are:

L2(LT): left-top
R2(RT): right-top
L3(LS CLK): left-botton
R3(RS CLK): right-bottom

GUI
Control scheme remapping
Configurable front touchscreen buttons
Configurable back touchscreen deadzone
Option to disable power save
Default config (now in ux0:data/moonlight/moonlight.conf)