That is the preinstaller utility, and only required if you are perfroming a new installation.
If you're perfroming an upgrade from a previous release, download "FreeFlow Core 4.0x" (you can validate the version number in the description field as "version 126.96.36.199.") Download the Release Notes for upgrade instructions.
Is this the right software file for the new version?
I downloaded this from the Xerox website. Also will it just overwrite the version 188.8.131.52?
Just want to be sure before I install the new version.