Connecting a 32-bit application—such as a legacy version of Microsoft Access or a specific Excel integration—to a modern PostgreSQL database requires a 32-bit ODBC driver. Even on a 64-bit Windows system, if your application is 32-bit, you use the 32-bit driver to establish a connection. Where to Download the PostgreSQL ODBC 32-bit Driver
Guide to Downloading and Installing the PostgreSQL ODBC Driver (32-bit) postgresql odbc driver 32 bit download
The official driver, known as , is maintained by the PostgreSQL Global Development Group. PostgreSQL ODBC driver: psqlodbc Connecting a 32-bit application—such as a legacy version