Please note, then instructions below are for upgrading from the earlier .NET
version to the later .NET version. If you are looking for the information how to
upgrade from Win32 version of FTP server to .NET version,
To upgrade from the earlier version of FTP Server .NET to a newer version, just launch the latest
setup FtpServerSetup.msi. Before
performing install, it will attempt to uninstall the previous version. It is important to answer YES when
prompted whether to keep previous settings.
Also, make sure to install the new version in the same folder where you had earlier