I solved the problem thanks to the insight you guys gave me. It turns out that I did not give my VST scan (showing All my 3rd party plugins a name). the field was blank so when I updated Platinum it defaulted to the (platinum plugins only plugin menu), (not showing my 3rd party plugins).
To solve this:
1) I gave the VST scan (showing all my 3rd party plugins) in the plugin manager a name.
2) I went into Platinum and also gave the plugin menu (showing all my 3rd party plugins) the same name in the browser & then clicked on that name in the FX bin plugin menu layout field.
3) I then updated Platinum to 2016.12 & all my 3rd party plugins were properly displayed in all menus!
I'm so happy I could go ice fishing on thin ice!
Thanks guys!