Robot Framework 2.9 and earlier have been distributed both as pip-installable source distributions and as Windows installers. The Windows installers only support Python, though, and required separate installers for 32bit and 64bit versions. Now that we age going to support also Python 3, that would require four installers: Python 2 (32bit), Python 2 (64bit), Python 3 (32bit) and Python 3 (64bit). Because of the required extra work, and because pip is bundled with Python 2.7.9 and newer, we have decided not to create Windows installers in the future anymore.