Second is to descramble your record in standby.
Example:
You record 5-8 films on hdd but your CI/CI+ descramble only one becouse is limitation.
Now when you seleckt this option box descramble this other 7 in standby.
This was made to have in one five function to setup in image.
Im now on zero4k ; im no remember this first plugin is in latest version image from VU+.
The first is not a real plugin: as bogdanm said, is just a way to put together some options but the same options are available elsewhere in the BH image.