JJOS versions are available for download as free trials. While most features are functional, the until a unique password (unlock code) is entered.
To summarize the search for a "JJOS password crack": jjos password crack
If you are the original owner, proof of purchase (a receipt or serial number) is your best tool. Some forum users have successfully contacted JJOS support (via the now-defunct JJOS website, though the developer is private) to request a master reset—but historically, the developer does not respond to password requests for security reasons. JJOS versions are available for download as free trials