If instead you meant as in improving the content of the file itself , that’s not recommended — the XML is digitally signed. Editing it manually will break the license.
A License.xml file removes the restrictions on how your library looks and behaves: Updating from Free to Premium - Features launchbox licensexml better
LaunchBox, developed by XBMC, is an open-source media center software designed to organize and play back your digital media collection. Its popularity stems from its clean interface, vast customization options, and support for a wide range of platforms, including Windows, macOS, and Linux. LaunchBox allows users to manage their games, videos, music, and pictures in one unified platform, making it an attractive solution for media enthusiasts. If instead you meant as in improving the