Good afternoon John,
First of all it is great to see so actively involved when we the consumers have questions, thank you for that. I have never really had a problem like this one I am encountering and the worst part is that I am not really at all tech savvy. He goes, Up until 2 days ago I had no issues with any of my programs communicating with MSFS2020 e.g. FSACARS and LUVCARS, with FSUIPC they would communicate freely without henderance. Today I wanted to do a flight after updating FSUIPC7 to version 7.3.8 and all of a sudden nothing worked anymore, I was going to do a SWA flight and the LUVCARS would not connect I got an error FSUIPC failed to connect, and unfortunately, I do not understand enough technical language to say troubleshoot the issues, I can do some basic but not advanced troubleshooting.