I'm using the latest version (SVN263)
Clicking on the "Release Notes" link goes to an outdated edition of the release notes (Version 3.70 Release (Sep. 22, 2004))
Either the release notes in the version that is being built has not been updated or the link is going to the wrong file.
Steps to reproduce:
Goto Help> About Crimson Editor
Left side of the OK button is a link to "Release Notes" Click on this link
Link will open an HTML document that contains the notes to Version 3.70 Release (Sep. 22, 2004)