Only to verify that the file is not empty (0 KB) or to check that the email field contains the correct address. Migrating Your License to a New PC Moving your LaunchBox setup to a new gaming rig or Steam Deck (Windows) is simple because of the portable nature of the app.
Unlike many modern applications that use an online-only verification system (where you log into an account), LaunchBox uses a to store your license credentials. This file contains encrypted information about your purchase—specifically, your email address and your license key . launchbox license.xml
You cannot change the email address here. That must be done via the official website. You cannot extend the expiration date (if you have a lifetime license, there is no date field; if you have a subscription, that data is encrypted inside the Key). Only to verify that the file is not
The XML format (Extensible Markup Language) is human-readable (though the license part is encrypted) and easily parsed by the LaunchBox application. It allows the software to check your license status instantly without an active internet connection. You cannot extend the expiration date (if you
The file got partially saved due to a power outage, or you accidentally opened License.xml in Notepad and saved it with a different encoding (e.g., UTF-8 with BOM).
However, like any premium software, LaunchBox requires a license to unlock its full potential. That license is not stored in the cloud as a simple key code you type in once. Instead, it comes in a very specific file format with a very specific name: .