TeamCity 4.5 is released. EAP is not active for now.

h2. TeamCity 4.x (Calcutta) EAP
{color:green}{*}Welcome to the cutting edge{*}{color} :-)

Calcutta is a codename for the TeamCity 4 version.

h3. Current build: 8909 released April 17, 2008 \| [Download|Download Latest] \| [Changes|ChangeLog]

This version of TeamCity contains new features, improvements and multiple bug fixes comparing to TeamCity 4.0.2.

{note}Please back up your data (database and .BuildServer directory, [backup explained|]) before upgrade\!
Newer TeamCity versions usually adjust the data structure and you will not be able to return to using older TeamCity versions once the data is upgraded.