The current style Appearance presets are not loaded from the control&physics1 tab. Don't use Load look from there. When you use Appearance preset > Select existing, it starts looking in your local area Custom\Atom\Person\Appearance. On the menu on the left, select AddonPackages Filtered (or flat, which can be slow), then choose one of the packages you downloaded. All the named preset tabs start looking in your Custom folder. You have to select AddonPackages. Make sure all the .var files you download are in the AddonPackages folder.
Try a simple test. Download my
Mayte character from the hub. There is a nude appearance preset, and a sample scene. There's also a clothing preset. If you can't load these, you're doing something wrong.