(originally just "Prezi") was the flagship desktop application. Unlike the newer "Prezi Next" or "Prezi Present" (cloud-only versions), Prezi Classic allowed users to work offline with a standalone desktop app. It was known for its robust offline editor, powerful flash-based (later HTML5) rendering, and unique file format ( .pez ).
If "6260" refers to a specific internal build number or a different software entirely, please clarify. Otherwise, treat this as your guide to moving from the "Classic" look to the "New" standard. prezi classic 6260 new