What site were you trying to download from? If I had to guess, you may have clicked on an ad for Centrify Express by accident receiving a different software package.
Centrify Express is software that joins UNIX, Linux and Mac systems to Active Directory, giving users the ability to log into a system using their Active Directory credentials or SSO using Kerberos (e.g. using PuTTY). If you want to learn more about Centrify Express check out the product site: http://www.centrify.com/express
If you want to use the software and have questions or want some training vids, check out the Centrify Express community site: http://community.centrify.com
If you want to uninstall the software you can remove using the included uninstall script:
In case you are still worried about the reputability of the Centrify software you may want to check out reviews from other independent sites. Here are few:
Hope this helps,
Corey Williams - a Centrify product manager