If you are using a very old PostgreSQL versions such as v8.4 which reached its end-of-life in 2014 then you will need to install and use PostgreSQL version
v12.18 and then restore your database(s) - see this guide:
https://www.pokertracker.com/guides/PT4 ... postgresqlWhen the newer PostgreSQL version is installed then the database update should complete. If you are already using PostgreSQL v9.3 or higher then go to 'Windows Start Menu -> All Programs -> PokerTracker 4 -> PokerTracker 4 (Logging Enabled)', reproduce the issue and then grab this file:
C:\Users\{Windows Login}\AppData\Local\PokerTracker 4\Logs\PokerTracker4.logand attach it to a
Support Ticket where a technician can follow up with you. If you do not see the AppData folder in Windows File Explorer then please refer to
this guide. When that's done you can try temporarily reverting to
v4.17.13 and restore your Backup.