After upgraded teamcity 7.1 to 8 I'm having some issues with the artifacts. I have noticed that there are artifact changes from the release notes: http://confluence.jetbrains.com/display/TCD8/Upgrade+Notes. After upgrading most of the artifacts got moved into a subdirectory named "_old" which was created by the teamcity upgrade. As this was done teamcity also removed all the artifacts from all the builds so now all the previous builds show as containing no artifacts. Why did the upgrade do this and is there a way that I can get all the artifacts added back in to the teamcity builds?