You receive the message "The MediaSeal decryptor tray is already running, please check your system tray or alternatively the MediaSeal decryptor could be running as a headless system service.
MediaSeal Decryptor is already running and only 1 instance is permitted to run at a time. You are trying to open MediaSeal Decryptor when it is already running. The application may be running as a headless service, or running your account or under a different user account.
Quit MediaSeal Decryptor from under the account where Decryptor is running.
Stop the MediaSeal Headless Service