Connected to an iSeries database using ODBC. It's not possible to toggle to ANSI type joins for an ODBC connection. It's only allowing regular WHERE clause joins.
WORKAROUND
1. Connect to a SQL Server or Oracle database using native connection.
2. Toggle on ANSI joins using the button in Query Builder.
3. Make connection to the ODBC platform.
STATUS
Enhancement request ST109070 has been submitted to Development for consideration in a future release of Toad Data Point.