Thankfully, you can still re-enable the old version of Notepad by opening the Settings App (press Windows+i) and navigating to Apps > Advanced App Settings > App Execution Aliases ...

To make Notepad files always open in a new or separate window in Windows 11, open Notepad setting and change the 'Opening files' option.

I just upgraded to Windows XP Professional from Windows 98 (I didn't a complete wipe of the hdd and reinstalled everything). In Win 98 I replaced my notepad with metapad (just by changing ...