If you have never downloaded the program before, you will need the full program.
If you have downloaded it before, you can try just the exe - if it complains,
try getting the full program.
If it complains about not finding some OCXs, download the OCXs zip.
If you do need the OCXs, just unzip into the same directory as everything else.
Please try to only download the package(s) you actually need!
Thanks.