Complex sentence: Kern Sibbald began the Bacula open source project in 2000, and since April 2002, Bacula has over 2 million downloads, which makes it the most downloaded open source backup program.
Split into simpler sentences: Kern Sibbald began the Bacula open source project in 2000. Since April 2002, Bacula has had over 2 million downloads, making it the most downloaded open source backup program.