Ahh the pipe dream access to your data...  I keep hoping for something that is read and write enabled.  It is never to be with Sage 50 it seems.

For read access try this: c:\windows\SysWOW64\odbcad32.exe and add your 32 bit connect there.  I do it all the time so I can build my own reporting and utilities to at least find issues.  Also, after the upgrade you have to re-enable ODBC connectivity in Sage.