You may want to change the default app Windows 10 uses to perform specific actions on your computer. For instance, Microsoft Edge is set as the default web browser during the installation or upgrade to Windows 10. To change the default web browser and other default applications (such as the music player, photo player, map program, or video player), follow the steps below:
Figure 1: Select Apps from the Settings menu
Figure 2: Select Default apps
Figure 3: Select the app that you want to change from the list of Default apps
Other Reference:
For more individual control over default app association, Windows 10 also allows for setting default apps to open specific file types. In the Default apps menu, click Choose default apps by file type at the bottom of the screen. Click to highlight the file extension you want to change in the Name column, then click the corresponding Default app to have this app open the particular file type: