"Open With" troubles

I didn't notice that the 'Always use this program..." box was checked before I clicked OK. Now, I have made a configuration file (.cfg) ALWAYS open with Notepad. I clicked the "change" button, but there are no programs or icons that I can recognize for a config file. It seems to me that this could be important. Especially since I am trying to follow a software vendor's instructions for loading a program and generating some sort of troubleshooting report. The program doesn't do what the vendor says it's supposed to, and I'm wondering if my "Open With..." mistake is the reason.

Can you help?

Thank You!!

 

Try explorer but don't check that box so this will not hurt you to try other extensions.

 

I doubt it. That is a setting for the User to use to open and /or view the file, not for the program. The program should know what to do with it.

But if you would like to change it back to the default, go to start>run and type regedit. Press enter. .cfg is not associated in my registry.

Navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.CFG
Click >CFG and look in the right pane for this entry:

Application.
Right click on Application and choose delete from the menu.

 

To Change File Associations:

1)Right-click a file with the extension whose association you want to change, and then click Open With.
2)In the Open With dialog box, click the program in which you want the file to open, or click Browse to locate the program you want.
3)Select the correct program to open with then "Always use the selected program to open this kind of file check box."