Windows Registry Editor Version 5.00

; Hide Gallery on Navigation Pane for current user
[HKEY_CURRENT_USER\Software\Classes\CLSID\{e88865ea-0e1c-4e20-9aa6-edcd0212c87c}]
"System.IsPinnedToNameSpaceTree"=dword:00000000

; Add `Show Gallery` option to File Explorer folder options, with default set to disabled
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\NavPane\ShowGallery]
"CheckedValue"=dword:00000001
"DefaultValue"=dword:00000000
"HKeyRoot"=dword:80000001
"Id"=dword:0000000d
"RegPath"="Software\\Classes\\CLSID\\{e88865ea-0e1c-4e20-9aa6-edcd0212c87c}"
"Text"="Show Gallery"
"Type"="checkbox"
"UncheckedValue"=dword:00000000
"ValueName"="System.IsPinnedToNameSpaceTree"