It not all sliders - just morph sliders that failing to work - this is some kind of bug in this software.
Here are appearance sliders working - also with Manifest

I am also curious why in iClone do I not get 2nd list with folders and images - but I do get them here.
Only 2 days with this software - of course this is just a weekend and no body is in office - I completely understand the software development profession.

But your suggestion of Manifest file did work nicely - not sure about morph editor - but thankyou 

But your suggestion of Manifest file did work nicely - not sure about morph editor - but thankyou 

The morphs are only for the actor, not the clothing. The clothing will reshape with the actor. Try clicking on "Actor" in the morph list. It is actually a set of nested folders that you can spin open. You have the shirt selected in your picture.

Hope RL would respond soon, but meantime just check if you have the following folders and/or if there is anything inside them (those are actual sliders):

C:\Users\Public\Documents\Reallusion\Template\Character Creator 2 for iClone Template\AvatarControl\CC Embed Morphs
C:\Users\Public\Documents\Reallusion\Template\Character Creator 2 for iClone Template\AvatarControl\Essential Body Morphs
C:\Users\Public\Documents\Reallusion\Template\Character Creator 2 for iClone Template\AvatarControl\Essential Head Morphs

I have them located in different root folder (since I selected custom during installation), but since your content downloader installed the assets in Public profile I assume sliders also should be there. And a structure as  pictured:

Well it not as simple as clicking on the correct object 

1. I just reinstalled the morphs package - which is full export version - no slider show up,
2. I told downloader to have admin access and included the manifest file
3. I watch the files being uploaded and I have no sliders

Well thanks but unfortunately it not that simple, I already notice that they are in that.  Even downloaded a custom character that would have without doubt customer morphs and if you notice it has the files located and in child directories and dates and time are when I just redownloaded them

possibly there is some configuration that does not have the location - I don't believe I installed custom location

I am not sure about re-installation process yet for main application

I am curious if any thing is done with this issue - I am in process of writing ticket up for this issue.