Under most circumstances, you need not modify datasource entries and driver value. In some instances, such as workaround strings to datasources, you may need to modify a registry string.
The registry in 64-bit versions of Windows is divided into 32-bit and 64-bit keys. The default 64-bit version of Registry Editor (regedt32.exe) that is included with 64-bit versions of Windows displays both 64-bit keys and 32-bit keys. You can use this regedt32.exe Registry Editor to make modifications to the 32-bit registry key changes required by ECDA.
You may also use the 32-bit version of the Registry Editor to change the 32-bit keys required by ECDA. The 32-bit Registry Editor version named regedit32.exe is located at:
%systemroot%\SysWOW64