Hi! I understand you're having trouble with changing your password in an app, and the change isn't working as expected. Let's get to the bottom of this together.

Could you please tell me a bit more? For example:
- Which app are you trying to change the password on?
- Are you getting any error messages, or does the app just not save the new password?
- Have you tried any steps already, like restarting the app or device?

In the meantime, here’s a general approach that often helps fix password change issues in apps on Windows:

1. Check the Password Change Process: Some apps have you change the password on their website rather than inside the app. Make sure you are changing it in the correct place.

2. Manual Password Update: If your password is stored in a password manager or saved within your browser or device, try manually editing or updating that saved password after changing it.

3. Clear the App’s Cache and Data: Sometimes, cached info makes the app not recognize the new password. On Windows apps, you can try signing out completely and signing in again. You can also check the app settings for any cache clearing options.

4. Restart App and Device: After changing the password, close the app completely and restart your computer. This can refresh the app’s connection to your account.

5. Check Date and Time Settings: Make sure your Windows device's date and time are set correctly and automatically—incorrect system time can cause authentication issues.

6. Update the App: Ensure the app is updated to its latest version, as there might be fixes in recent updates.

7. Network Check: Confirm your internet connection is stable, as network issues can interrupt password update requests.

If you've tried the above or have specific details about the app or errors, please share them. I can then offer more targeted steps.

For certain apps, such as those involving Google or Microsoft accounts, there might be additional settings like app-specific passwords or security verification steps that you need to complete.

Are you satisfied with this initial guidance, or would you like me to help you with detailed steps for a specific app?