Why did Supremo loose the static password?

There was probably a corruption of the settings.dat file, located inside the path C:ProgramDataSupremoRemoteDesktop.

We suggest to uninstall the service (if installed), close Supremo, delete the settings.dat file and then re-launch Supremo.

Of course, Supremo must be re-configured. The ID of the machine may also change, in some rare cases.