If you click the "New" button can you create a new database? If not please restart PokerTracker 4 using the logging enabled link on your Start Menu, reproduce this problem and then report it via our
support system with your log file and some of your most recent PostgreSQL log files. You can find the PokerTracker 4 log file here:
C:\Users\SOME_NAME\AppData\Local\PokerTracker 4\PokerTracker4.log
If you do not see the AppData folder in Windows File Explorer then see
this guide. If PostgreSQL (64bit) was installed to its default location then you can find those log files in this folder:
C:/Program Files/PostgreSQL/9.3/data/pg_log