MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Your X & Y belts are not tight enough. The tend to come loose from the factory - I Had the same issue. The slack causes circles to be elongated. Simply tighten the belts and you will have perfect circles in just a few seconds of adjustment. Y is the belt on the heat bed, X is the belt on the Hotend. You'll find a detailed explanation on the reddit tread below.