To upgrade SpamFilter you can simply download the "binaries" only package from the website, extract the two executables SpamFilter.exe and SpamFilterSvc.exe in the SpamFilter directory overwriting the old ones, and restart SpamFilter. 99.9% of our upgrades can be performed this way. Sometimes the zip may contain updated DLLs and/or a new GeoIP.dat file, in which case simply copy them over to the SpamFilter directory as well.

If you wish, you can also upgrade using the "usual" setup.exe installer, which essentially will do the same thing (upgrade the executables and leaving all the config files intact). However, if you'’re like most admins, you will prefer to have total control of your upgrades, thus our first method will probably be your preference :-)

PS - There is no need to install "intermediate" update files.