Work has been busy and I have been focusing mostly on my languishing scientific imaging projects for the past few weeks. SharpCap continues to evolve quickly. If there is interest I can refresh the guide with recent changes.
I think an updated version would help, mostly in regards to the newer histogram controls. I still send new people to your guide and they're probably downloading the latest version.
I think the guy who did the 2.9 manual for Robin is also working on an updated 3.1 manual.