You can redownload all your mods and skins, they have been updated to the new format to support updating inside of the mod loader.
Are you having problems using one click install?
One click install doesn't work if you've installed the modloader without administrator permissions.
You can fix one click install by launching the modloader as an administrator and hitting the "Reapply"
button in the settings.
Avatar Hider
This mod hides your player's avatar. There are a couple of settings to configure which parts you want hidden. The hope is to help enable mixed reality content recordings, however that's proven quite difficult due to alignment issues