An updated version of the 2015B Gemini Observing Tool is now available for download. A 2015B version is required to communicate with the Observing Databases, and the updated 2015B.1.1.2 version is strongly recommended as it fixes several bugs which were found in the initial release.
Installation instructions are linked off of the Observing Tool web page, and we recommend that everyone download their programs from the databases rather than import from saved XMLs.