Ooh, I just fixed it. Thanks for your help. So what I did was I uninstalled Ubooquity 1.10.1, QJDK8 1.8.33 (I noted that I actually had an earlier version than the one you linked me to), and JRE 8.101.0. I then reinstalled each of them, including the newer version of QJDK8. Once all that was done it loads up for me again.

Now to begin the long process of starting a fresh scan of my collection.

Really appreciate your taking the time to help me out. Thanks!

Thank you for the reply Kenji, lots of good information there.

I am wondering why I would suddenly need a certificate and key to get this to work now though? On QTS 4.2 all I had installed was the ubooquity 1.10.1 package and it's required dependency, QJDK8 1.8.111 64 bit. Then it all just worked. Did security tighten up with QTS 4.3 that now warrants me needing to take these extra measures you mentioned just to get this to work again?

I also can't get Ubooquity to work now that I've upgraded to 4.3.3.0095. The site can't be reached when trying to get to the admin page for it. I've uninstalled and reinstalled version 1.10.1 but it hasn't helped. Any help would be appreciated to get this going again!