Windows 10: Undo or reset Always use this app to open files option in Windows 10

Every file opens with one of the built-in apps in Windows 10 by Microsoft. For example, you may want to set Photos as the default app for a photo viewer. If you are not satisfied with the options suggested by [...]

This post Undo or reset Always use this app to open files option in Windows 10 is from TheWindowsClub.com.

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Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

How to undo "always open with" option in Windows 10 (1803 build)

I accidentally click "always open with" a particular application on a BibTeX file and now the icons of all such files change to the icon of that app and I cannot find a way to undo the operation. In fact, I want Windows to always ask me how to open
a BibTeX file instead of sticking to a specific program. Thanks for any suggestions!

Here I found some related posts but none of them seem to solve my problem:

• How do I undo "Always open with" option in Windows 10
• How to undo "Always open with" option in Windows 10

Here are what I've tried, but none of them works:

• Execute "assoc .bib= && assoc .bibtex=" in cmd.exe as Administrator.
  Nothing happens.
• In Settings under "choose default apps by file type", remove the default app at ".bib" entry.
  However, there's no such entry.

 

Undo option in File Explorer

Hi Helena,

We appreciate your time and effort for getting back to us.

Try the following steps and check if it helps:

• 
  Press Windows + E keys from the Keyboard to open the
  File Explorer.
  
• 
  Click on the drop down of Customize Quick Access Toolbar beside
  File Explorer.
  
• 
  Click on Undo.
  

Kindly let us know if you need any further assistance with Windows. We are glad to assist you.

Thank you.