If a product has been updated since you last downloaded and installed the software, it is recommended
that you download the more recent .zip file. You can then uninstall your current software using Windows Add/Remove programs, unzip the "new" software and run the setup program.
It is important that you uninstall your "old" software before installing the new, since the old files
will not be overwritten by the new unless the version of the software has changed.
Removing your "old" software will not affect your data files, but you should copy them to a backup folder
as a precaution.
Updates
Once installed your product should have a version number of 5.1.0 or higher.