Where can I find old documentation

I have ComponentSpace.SAML2.dll that was purchased a while back and I need the documentation that works for this version.
The version is:
SAML v2.0 for .NET4
Date modified 12/21/2015 8:33am

Do you still have the MSI installer? This installs the binaries, examples and documentation.
If you don’t have the MSI, please contact support@componentspace.com.