Does anyone know what compression alogrhythm that they used?
How could I get in touch with one of their programers?
I really need to get my data back.
I am willing to pay.

The following is from some old notes I had on file:

"Stomp were license sales. Veritas sold the software to Sonic who then allowed Stomp to sell it under their name for a while, and selling it under the Sonic name at the same time. After purchasing Roxio, Sonic started selling under the Roxio name."

You could try Sonic at this number 1-877-769-4601 (you will have to pay) or go into the Support (top of this page) and try that.