menuBUS is no longer for sale as I have moved on to work for the great software company Rogue Amoeba!
If you are looking for software similar to menuBUS, please check out SoundSource.
Customers can still contact me to get support regarding their purchase. Please include your serial number in the subject field.
If you are a developer / company interested in owning menuBUS the business then please contact me as I would love to see the app developed further.