Complex sentence: The master tapes for the album went missing for over 18 months, and it was finally released in February 1993, by which time the band had fallen from favour, and while they continued to play live infrequently, Addictive finally broke up in 1996.
Split into simpler sentences: The master tapes for the album went missing for over 18 months--it was finally released in February 1993--by which time the band had fallen from favour. They continued to play live infrequently, Addictive finally broke up in 1996.