If you read the installation instructions it mentions that 4.7 already includes it and there's no installation needed. (But this IS Adobe... I guess it wouldn't hurt to try)
As for the compile issues:
Digging into this issue, I've been trying to get it past the crashes.
One thing I did was to change initClass in Gestouch.as to add a starling.display.DisplayObject in addition to a flash.display.DisplayObject, but I noticed the new NativeDisplayListAdapter doesn't pass in any values.
And without values, the displayListAdapters array never get initialized with any data outside of null.
So, when I try to instantiate a SwipeGesture pointing to a Starling Sprite, it can find a compatible adapter entry in the displayListAdapters, but it's a null entry.
No matter how successful this line is:
Gestouch.gestouch_internal::getDisplayListAdapter(target); (line 97 in Gestouch.as)
It'll always return null as long as NativeDisplayListAdapter is instantianted with null.