Where are windows universal application registry changes saved?

In Windows, Universal Windows Platform (UWP) applications store their registry changes in a database called the "AppData\Local\Microsoft\Windows\UsrClass.dat" file. This file is located in the user-specific directory and is not directly accessible or editable by users.

The "UsrClass.dat" file is a binary file that contains the registry hive specific to each user. It stores the registry settings and configuration for the user's installed UWP applications, including their preferences, settings, and other related information.

The exact path to the "UsrClass.dat" file depends on the user account and the version of Windows you are using. The file is located in the user's profile folder, typically under the "C:\Users{username}\AppData\Local\Microsoft\Windows" directory.

Note that modifying the "UsrClass.dat" file directly is not recommended and can potentially cause issues or break the functionality of UWP applications. The preferred method to modify UWP application settings is through the application's built-in settings or configuration options, or by using the appropriate APIs provided by the UWP platform.

If you need to programmatically access or modify registry settings for UWP applications, you should use the appropriate UWP APIs, such as the Windows.Storage.ApplicationData.Current.LocalSettings API, which provides access to application-specific settings and data storage for UWP apps.

It's important to follow the recommended practices and guidelines provided by Microsoft when working with UWP application settings and the Windows registry to ensure proper functionality and compatibility with the UWP platform.