Good luck
I just recently had to reinstall FSX as well due to corruption and it took a long while to get it back to how I like it. Thank goodness I had a backup of my fsx config outside the fsx directory. Sometimes a clean install is good tho. After years of playing around there was a lot of junk in my install
I'll be doing a new video soon to show how to use the full flight plan support. I've really tried to make it as easy and seemless as I could. The big thing to remember is make sure FlightConnect is running BEFORE loading the flight plan in FSX or Prepar3D.