If your v9.6 PostgreSQL is configured to use port 5433 and not the default (5432) then presumably you still have an old version of PostgreSQL installed using port 5432 or an old version that was not completely uninstalled. If you need further assistance please turn on 'Enable Logging' in PokerTracker 4 via 'Configure -> Options' and then restart PokerTracker 4. Next reproduce this issue and then attach your support bundle to a
Support Ticket along with your screenshot. The support bundle is created via the 'File -> Create Support Bundle' menu option in PokerTracker 4.