I'm not sure if it is already been told as I didn't find anything.
You can make Notepad++ your default notepad by simply going to "Folder Options" ,to "File Types" tab and select TXT and then "Advance". Select "open" from "Actions" and then hit "Edit". Under "Application used to perform action" add you Notepad path or click "Browse" to guide you and at the end of the path don't forget to add "%1".
That's it.Now every txt file open with Notepad++.I found it a lot easier than replacing Notepad++ to all this folders and/or modifying registry.I hope it will help you too.
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I'm not sure if it is already been told as I didn't find anything.
You can make Notepad++ your default notepad by simply going to "Folder Options" ,to "File Types" tab and select TXT and then "Advance". Select "open" from "Actions" and then hit "Edit". Under "Application used to perform action" add you Notepad path or click "Browse" to guide you and at the end of the path don't forget to add "%1".
That's it.Now every txt file open with Notepad++.I found it a lot easier than replacing Notepad++ to all this folders and/or modifying registry.I hope it will help you too.
Did you tried the explanation on this page (scroll down to just below the plugin list)?
http://notepad-plus.sourceforge.net/uk/download.php
Why don't you just use the built in feature?: Settings-Preferences-File Association
Perhaps he wants to see the Notepad++ icon for .txt extensions as opposed to the normal .txt icon.
Like you I'm surprised he doesn't just use the Settings-Preferences-File Association for this.