We did not develop the Decibel app. Marc had a program called Earworm which worked well with Decibel. When he found out about our product, he optimized the app for use with Decibel and put out the new version. We're not associated with it, really, other than it works with our product.
Any support questions will be best answered by contacting him directly: marc@marckerstein.com
These instructions should be rolled into the app soon, but just in case: http://www.marckerstein.com/?decibelinstruct
Let us know if you have any further questions.