In 1.0.1 (free) BBE works fine - but only 20sec ("...buy plus").
I just quote the speculations from anythingbutipod
It turns out, it might very well have been some legal issue between Cowon and BBE Sound Inc. instead. The updated free version 1.0.2 and the now available paid version of JetAudio do not feature BBE and BBE ViVA sound enhancements (read the article below for my gushing about how nice they sound). Being basically the main selling point of the application, this does come as a bit of a shock. There is no explanation about the removal on the Play Store, on Cowon’s JetAudio website, or anywhere else – BBE simply disappeared from the screenshots, and it isn’t mentioned in the changelogs either.
So if anyone has paid 1.0.1 - be happy, keep it (and share this rarity