Where do I download the old v4/v5 installers?

WARNING: both version 4 and version 5 are now discontinued and retired, so please be aware that downloading the following installers comes with no guarantee of support or fitness-for-purpose of any kind. Syncplify, Inc. is also not liable for any malfunction or damages these versions of the software may cause, for any reason, to the maximum extent permitted by law. If  you continue, you take full responsibility, and do so at your own risk.

Download: version 4.2.5 installer

Download: version 5.1.30 installer