Please go to:
Plugins>Help Files>FPP Engine Help
This will open up a help file in .pdf format (Adobe reader)
Edit>Find (or use CTRL+F)
Put in the search terms and you will have most of the answers in a couple of clicks.
The following two are not covered in the .pdf file:
Mouse Children is not really documented
Enables interaction of interactive elements inside it's container (only used for .swf)
Smartscale is supposed to resize hotspots intelligently... it is a plugin, and personally I never use it... and found it rather dumb when I wanted to use it.
My destiny isn't carved in granite ...
It's written with a stick in dry sand ... on a stormy day ...