If you've previously installed SA-FileUp, the upgrade is simple. First un-register the previous version.
C:\> REGSVR32 /U C:\WINNT\SYSTEM32\INETSRV\ASP\CMPNTS\SAFILEUP.DLL
And then, follow the Quick Installation instructions found earlier in this document.
If you are performing the automated installation, you should delete the old SAFILEUP.DLL from your system.
If you are performing the manual installation, when performing Step 1, the File Copy, you will simply over-write the old version of SAFILEUP.DLL with the new version.
You can leave the previous version on your system under another name (e.g. SAFILEUP_OLD.DLL). If you choose to do this, please ensure that the correct version is registered. Simply renaming the file is not sufficient.
You will need to re-start IIS for the change to take effect.