I have the same issue but i know why.Took a little break but now I'm back and going to be releasing a few more updates. There are a few cool features already implemented while I was waiting till this update gets approved, they'll make it into the next release, like support for hub bookmarks and favorites.
Implemented this, will be released in the next version
You mean you want hair from dependency packages to be visible? The only way to do that is to disable auto hide entirely. If you want some specific "hair pack" then you can promote this package from dependency to a regular package. Alternatively, you can go to content browser -> select hair category -> select all -> click unhide, but you'll need to do this every time you install new stuff which is a hassle.
It can't detect thumbnails for your scenes. Do they have thumbnail files next to them?
if the *.var is in a subfolder then the manager can't show the picture (if you try to browse the file of the package you have your answer)
Here an example : my .var is in a subfolder by creator ( so in AddonPackages\Wunderwise\*.var)