Posted 5 years ago
I think what he did was open the file in another program and left the use this program in the future to open these files checkbox on. This can be reversed on Windows, I would suggest you to do a google search and see the steps to reverse it. or you can try the steps below:
Press Windows + X keys and select Control Panel.
Select Default Programs. Select Set your default programs.
Select the application and right side click on Set this program as default.
Again click on the application left side and click on Choose default programs for this application in the right side.
Check the Select all and click on Save changes.
Restart the application and check if the issue persists.
Press Windows + X keys and select Control Panel.
Select Default Programs. Select Set your default programs.
Select the application and right side click on Set this program as default.
Again click on the application left side and click on Choose default programs for this application in the right side.
Check the Select all and click on Save changes.
Restart the application and check if the issue persists.