What version of the UScan software do you have? You can find the version by pressing the ‘?’ at the top right of the screen.
I am guessing you have the initial release 1.0 version. This version did not allow editing of the Calibration Methods.
Please update to 18.104.22.168. You will find this in the Downloads section along with instructions for upgrading your SpectraStar XT. You must be logged into the website to download this update. I have placed the link below also for your convenience.
Once you have updated UScan, please go to the Configuration section, press the pencil Edit button and browse in the updated PRD file. Press Save and the Calibration Method and all products that use that calibration method will be updated.
Please let me know if you have any questions.