How to Remove ODBC Data Source if Driver is Removed
They are defined in the registry under \ODBC\ODBC.INI\ in various places depending on if the definition is
To delete a data source, you have to delete the data source key under
ODBC.INI and the entry under
ODBC.INI\ODBC Data Sources linking your data source to the driver.
I had same issue here. But I found my 32 bit entries under: