See here for docs on HS4 plugins; installing, updating, registering, and more.
If you need more assistance on using Devices within HS4, take a look at these docs.
For assistance on using Events in HS4, check out these docs.
Docs on using the Live View and Recordings within HS4.
Information on all of the various setup options and pages.
See here for using the various Tools provided in HS4.