Notes about the DMB file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The DMB file type is primarily associated with 'BYOND' by BYOND. BYOND (Build Your Own Net Dream) is a platform for forging, publishing, and playing multi-user, multi-media, networked games. You need to be running the BYOND software to play the games defined by the compiled byte-code.