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I've installed [insert favourite text editor here] and associated it with all file extensions which by default open with notepad.exe. Still, there is a context menu entry Edit e.g. on *.txt files which still brings up Notepad.

How can I change this context menu entry to also open my editor instead of Notepad?

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There are two places in the Windows registry that define context menu entries:

  • File extension

    For *.txt files, the default value of HKEY_CLASSES_ROOT\.txt points to HKEY_CLASSES_ROOT\txtfile, which defines the context menu entries

  • Perceived type

    *.txt files have a perceived type text (see PerceivedType property in key HKEY_CLASSES_ROOT\.txt), and that type defines its context menu entries at HKEY_CLASSES_ROOT\SystemFileAssociations\text

If you also change the commands for the perceived type text, you should always get your favourite editor for all text files.

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