Help! Waves Plugins will not load

I went to work on a session this morning that I've been working on for the past several days and I got a message that said something about my WaveShell-AAX_Prefs file was not a valid AAX format and it moved it to an Unused folder. Now none of my Waves plugins will load. All of my Waves plugins worked just fine yesterday and have for the past several years. Does anyone have any idea what happened and how I might fix this? I tried clearing my PT preferences. I also did an upgrade/install (I have the Waves upgrade plan) on all of my Waves plugins. That didn't make any difference.

Thanks in advance for any help!