Wait -- you AREN'T using the latest version of Leap Motion? Isn't that a requirement? I wouldn't worry about the Leap itself -- I have the very original version (actually bought during a sort of "Kickstarter" campaign) and it works fine with iClone.
The plugin ought to show up, though, regardless (I just disconnected my Leap and brought up Live and it still shows the plugin). So after you get the right version of Leap on your computer I would do the following:
Make sure you delete both Leap and Live like you did previously. And also make sure that Trial is gone from your computer. And then go ahead and delete iClone as well (do all of this through the Windows Remove program routine so you are sure it's done right with no traces of any RL programs remaining). Your content won't be affected, although as always you should back things up.
Now make sure you have the very latest version of Real Illusion Hub installed. Run it and let it install everything back for you. Now see what happens. I'm guessing all will be well, then (it may be that having that trial on your computer may have screwed things up, but the Hub install should put all right).
Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley