In some situations, it may be necessary to make a clean install to make an upgrade work. You can do it by following steps below:

• Backup your host keys in etc directory (etc/ssh_host*)
• Uninstall the existing version of Copssh
• Remove remnants of the installation directory except home directories if they exist
• Make sure that the service account and the sshd account are removed if they exist
• Install new Copssh
• Restore host keys back to etc directory
• Start Copssh Control Panel and verify that the service is running
• Activate your users again and specify their existing home directories as the home directory during the activation