This page is confusing in numerous ways and is missing files.

http://our.umbraco.org/projects/umbraco-pro/contour

1. The headings are unclear and never state with specificity which versions the "upgrade" refers to.
2. To Upgrade, Download the "Contour3.0.21upgrade.zip" and unzip its contents in the root of your website, installation guid is available as a pdf below" No file with this filename exists within the package downloads.
3. There is an update file for version 6/7,but not for version 4.x, pre- or post- 4.10. This suggests that Version 4 is no longer being supported by updates.
4. The confusion engendered by this is regrettable and provides a lack of guidance to developers.