neowin[.]net/guides/how-to-permanently-restore-old-file-explorer-in-windows-11/
Neowin picked this up from the German site Deskmodder. To say Windows carries a lot of baggage from older versions is an understatement. Sometimes that's a good thing, e.g., I passionately loath Explorer's new context menus, so the 1st thing I do with a new Win11 install is switch those back. In this case, Neowin published the registry changes to switch Windows Explorer back to the old, Win10 version. Copy/paste the following in a new, empty .txt file, and save it as [SomeName].reg [replace [SomeName] with whatever you like]. Double click it, click OK to the prompts, and either restart Windows or find Windows Explorer in Task Mgr., right click it, & click restart.
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Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Classes\CLSID\{2aa9162e-c906-4dd9-ad0b-3d24a8eef5a0}]
@="CLSID_ItemsViewAdapter"
[HKEY_CURRENT_USER\Software\Classes\CLSID\{2aa9162e-c906-4dd9-ad0b-3d24a8eef5a0}\InProcServer32]
@="C:\\Windows\\System32\\Windows.UI.FileExplorer.dll_"
"ThreadingModel"="Apartment"
[HKEY_CURRENT_USER\Software\Classes\CLSID\{6480100b-5a83-4d1e-9f69-8ae5a88e9a33}]
@="File Explorer Xaml Island View Adapter"
[HKEY_CURRENT_USER\Software\Classes\CLSID\{6480100b-5a83-4d1e-9f69-8ae5a88e9a33}\InProcServer32]
@="C:\\Windows\\System32\\Windows.UI.FileExplorer.dll_"
"ThreadingModel"="Apartment"
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\ShellBrowser]
"ITBar7Layout"=hex:13,00,00,00,00,00,00,00,00,00,00,00,20,00,00,00,10,00,01,00,\
00,00,00,00,01,00,00,00,01,07,00,00,5e,01,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
-----------
And if you want to switch it back, you can delete those keys either manually using Regedit, or creating and then merging another .reg file with the following few lines. [The "-" means delete.]
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Windows Registry Editor Version 5.00
[-HKEY_CURRENT_USER\Software\Classes\CLSID\{2aa9162e-c906-4dd9-ad0b-3d24a8eef5a0}]
[-HKEY_CURRENT_USER\Software\Classes\CLSID\{6480100b-5a83-4d1e-9f69-8ae5a88e9a33}]
---------