Hi all,
I had to read this thread from top to bottom to get a handle on what is being discussed. Here's my take on the issues:
Prior to 2017, new users could access the Learning Path tutorials with no download. That hasn't changed in 2017. For additional tutorials, we provided a download site which had a list of self-extracting files with no thumbnails or any info on what you would learn in the tutorial. The old style (pre-2017) tutorials were powered by xml files. In 2017 we switched to json files.
We do have the ability to convert old tutorials you created to the new json format, so please reach out to me if you need help with any conversions. The tutorials that were available on the download site are in the process of being updated and republished in the new format, so there is no need to convert those. If there are some previously available tutorials that are not published yet that you need now, let us know so we can prioritize.
In 2017 we introduced a new delivery system for the guided tutorials along with the new engine. Publicly shared tutorials simply appear in the Available Tutorials area of the gallery the minute they go live, so check back often! There is rich descriptive text when you mouse over an image and you can also search the tutorials in the gallery with keywords. For example, if you search for contour flange, you will see that the command is used in Sheet Metal 3.
And in 2017 R3 that just went live, we turned on the authoring tool!
That means that anyone can now create and share tutorials publicly or privately. The mechanism is very similar to how Screencast works. Click Create Tutorials to begin the process and to view the two how to videos embedded in the tutorial anatomy page that appears. There are also some helpful hints for authors located here:
http://help.autodesk.com/view/INVNTOR/2017/ENU/?guid=GUID-03AA0761-0FBC-4772-8C09-6AA74C48CAA3
And last but not least, if you can't run the tutorials (i.e. DesktopConnect error), let us know so we can resolve the issue!
Let us know what you think!
Thanks,
Paul

Paul Normand
Principal Content Developer/SME
Design Lifecycle and Simulation (DLS)
Autodesk, Inc.