Newer versions of Notes and Domino (10, 11, and 12) do have some new functionality. However, all the existing functionality from Domino 9 is still available in the newer versions of Notes/Domino. TLCC's Domino 9 courses will continue to be very valuable in learning Domino development and administration for Domino 10, 11, 12 and beyond.
All TLCC Notes and Domino 9 courses have an updated installer to allow installation on Notes 10, 11, or 12 systems. If you have an existing course installation file it will NOT work on the newer versions unless you have downloaded the updated course download. If your course is still active you can download the updated installation file for your course(s). The Downloads page has a column to indicate which version of Notes that the installer will work on.
If your courses do not appear in the Downloads page than you will have to re-enable access to the course. To re-enable your access will only cost $99 per course.