Hi Mark,
Thank for your question.
The file version represents all information that you need. For example 2011.2.0725 should be translated like:
2011 - The year of the release
.2 - Q2 official release
.0725 - month and date 25 July
Greetings,
Hristo
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!