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When using Windows 11, the OS keeps track of which apps open which types of files by default. For example, Notepad usually opens TXT files. Here's how to change those default file associations in Settings.
How to Find the Default Apps Menu in Settings
The Windows 11 Settings app provides a convenient interface for selecting or changing which apps open which types of files. To find it, first, open Windows Settings by pressing Windows+i on your keyboard. Or, you can right-click the Start button and select "Settings" from the menu.
In Settings, click "Apps" in the sidebar, and then select "Default Apps" on the right side of the Window.
Once you're on the Default Apps screen, there are several different ways to change your default app settings. We'll go over two of them in different sections below.
How to Choose Defaults by File Type
One of the easiest ways to change a default app is through searching by file type. In Settings > Apps > Default Apps, you'll see a text box labeled "Enter a file type or link type." Click that box and type in the name of the file extension that you'd like to associate with an app. For example, ".txt" for text files or ".jpg" for JPEG images.
If you typed an extension that isn't registered, you'll see a button labeled "Choose a Default" that will allow you to set the default app for it. (If that's the case, click it, and you'll follow instructions similar to those listed below.)
If you typed a known file type, you'll see the app that the file extension is currently associated with just below the text entry box. To change the association, click the app box that appears.
A pop-up will ask "How do you want to open [extension] files from now on?", with [extension] being the type of file extension that you're working on, such as .txt or .jpg. In the list of apps below, select the app that you'd like to use, and then click OK.
From now on, the file type that you just modified will open with the app that you selected. You can change it back at any time in Settings > Apps > Default Apps.
How to Choose Defaults by App
You can also change file associations by app. On the Default Apps screen, you'll see a list of installed apps. Locate the app that you'd like to change defaults for (or search for it in the text box), and then click it. We'll use Photos as an example.
On the details screen for the app that you chose, scroll down and select the file type that you'd like to associate with a different program.
When Setup asks you which program you want to open the file with, browse the list, select the app that you want to use, and then click "OK."
After that, the file association will change. Repeat as desired to fix everything up just how you like it.
Change File Associations by Opening a File
Finally, you can also change default file associations when you open a file. First, locate a file of the type that you want to re-associate with a new program on your desktop or in File Explorer. Right-click the file and select "Open With," and then "Choose Another App" from the menu.
In the menu that pops up, select the app that you'd like to always open this file type with. Then, check the box beside "Always use this app to open [extension] files." Then, click "OK."
And that's it. From now on, whenever you double-click that file type in File Explorer or on your desktop, it will always open in the app that you selected. Good luck!