To change each one go to the web interface > Properties > Services on the left hand side > Workflow Scanning > Default Template
If you already have teplates under Scan then those will need to be udated in a similar fasion because the Default will only populate new scan templates. Once you have updated any Scan Templates then you create a clone and you will unfortunatly have to update them all with the clone file if there all set with the same templates on all 50.