Hello,
I am a team member over at Landing Rate Monitor which relies on FSUIPC for data. We are also getting reports by users not being able to have LRM connect to FSUIPC. Here's two example reports:
Considering two other ACARS/Tracking software also face this issue with the only thing in common being FSUIPC, and users have reported no issues after reverting to 7.4.2, I can with certainty confirm the issue originates from this update.
Would love to post my own personal log file but I have non generated at my installed location (C:\Program Files\FSUIPC), even after 3 simulator runs (and flying). Please let me know if you would like us to forward something to the users (like changing some setting, adding more logs, etc.) to assist debugging the issue.