The Compressor 2.0.1 software update provides improved reliability and is recommended for all Compressor 2.0 users. If you use Apple Qmaster, you must update it to version 2.0.1 for compatibility with Compressor 2.0.1. For more information about the Compressor 2.0.1 update, download the most recent Late-Breaking News document by opening Compressor and choosing Help > Late-Breaking News.