The help files for the Custom and Custom2 components are also missing from 3.4.7.48. Perhaps somebody needs to review the 3.4.7.48 build and verify that everything that should be in it is.
I dont think that there are any help files for the custom components. However there is a guide detailing their operation available on the beta component sections of the support area. This is also available via the main Flowcode page of our website.
From a usability standpoint, a small blurb in a help file that says that would be good. As it is, the help button on the properties dialog boxes for these two components tried to load custom.hlp and custom2.hlp, which aren't there, leading users to think they are missing.