Complex sentence: Nason left the band due to prioritize his project, Me Myself Alive, where he is a bass guitarist shortly after the band released their debut album, "The Drug In Me Is You", which was released on July 26.
Split into simpler sentences: Nason left the band due to prioritize his project Me Myself Alive, in which he was a bass guitarist. Shortly afterwards the band released its debut album, "The Drug In Me Is You", on July 26.