If you used a custom installation directory, edit the command accordingly to point to the correct directory. Note that the commands above assume that you installed Notepad++ in its default location. Reg delete 'HKLMSoftwareMicrosoftWindows NTCurrentVersionImage File Execution Optionsnotepad.exe' /v 'Debugger' /f To undo this change and restore standard Notepad as the default text editor in Windows, open another admin Command Prompt and use the following command (which is the same for both 32-bit and 64-bit versions):.

This setting immediately enables the dark theme for Notepad. If you want to enable dark theme for notepad app, select the App Theme option to Dark. On the Notepad app settings, click the App Theme and select the app theme to display. Instead of standard Notepad, you should see Notepad++ launch. Launch the Notepad application and click the Settings icon. Now test out the change by performing an action that would normally launch Notepad, such as opening a text file.

You’ll see the message The operation completed successfully if everything worked.

Reg add 'HKLMSoftwareMicrosoftWindows NTCurrentVersionImage File Execution Optionsnotepad.exe' /v 'Debugger' /t REG_SZ /d ''%ProgramFiles%Notepad++notepad++.exe' -notepadStyleCmdline -z' /f Reg add 'HKLMSoftwareMicrosoftWindows NTCurrentVersionImage File Execution Optionsnotepad.exe' /v 'Debugger' /t REG_SZ /d ''%ProgramFiles(x86)%Notepad++notepad++.exe' -notepadStyleCmdline -z' /f

From the Command Prompt, enter one of the following commands depending on the version of Notepad++ you have installed:.

Update notepad++ theme