Tenable - Useful Links
Tenable have a great, well organised web site; that said not everything is just where you would expect it, so this page brings all of the important things together in one please.
All Tenable subscriptions come with platform updates and vulnerability updates. Nessus Pro only gets electronic support i.e. portal and email (the “Standard” program), the other products also get telephone support (the “Advanced” program).
This page details the different support packages: https://www.tenable.com/support/technical-support/plans
The support contact details (web, phone email) are on this page: https://www.tenable.com/support/technical-support#contact-support
Tenable offer free eLearning courses for all their products. You have to register first, but then anyone can have access to the content. Start here: https://www.tenable.com/education/on-demand-courses
There are also paid instructor led courses, details here: https://www.tenable.com/education/instructor-led-courses
Tenable put all their documentation online, visible to everyone. This includes things like the install notes, hardware requirements etc.
Start here and navigate by product: https://docs.tenable.com/