The documentation is found in 2 places:

a) Github repository: https://github.com/strikingdoc/striking/


but some will find github not to be easy to navigate.  So the documentation is also found in pdf format, with some help videos at

b) http://www.strikingsupport.com/video-tutorials

and more likely you will find this to be the place to start for documentation and some helpful videos.
