Very much there is no help (manual) in the program (and not online here on the site) with illustrations and / or video lessons - at least for using the main functions of the program.
Documentation for Helium 12/13 can be found here:
If is also available from the help menu from inside the application.
Since older versions of Helium is no longer maintained and are not available from our website, the best way to access help for these versions are via the Internet archive for example.
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It is also available from our webpage, www.helium.fm.