Return registry to default in Windows 11 - how?

[t8769]

Changed the Start menu to old style, using this
Advanced and select New → DWORD (32-bit) Value.

From here

https://www.technipages.com/windows-11-how-to-get-the-old-start-menu-back

Would like to go back to Windows 11 menu but can't find how to do this.
Deleted the file I made, Start_ShowClassicMode.

Can't find any way back to default Win11 menu, can anyone tell me how to do this.