When looking at the ODBC drivers from Microsoft for SQL Server, I see that the same driver DLL is used for both 32 and 64 bit. Not exactly sure what "magic" are they doing in the background but would love to see a similar thing for DataDirect.
I tried pasting an image but that is not appearing in my request. To see what I am referring to, please check the SQL Server drivers from Microsoft. The "Platform" column will contain 32/64-bit.