Remove "Open in Terminal" from the right-click menu — via Winaero

Registry change

Double-click a .reg file and confirm to merge it. Right-click → Edit first if you want to read it, which is always a good idea with any .reg file from the internet.

Apply

Windows Registry Editor Version 5.00

; Oddbyte.Me: Remove "Open in Terminal" from the right-click menu

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked]
"{9F156763-7844-4DC4-B2B1-901F640F5155}"=""

Undo

Windows Registry Editor Version 5.00

; Oddbyte.Me: undo Remove "Open in Terminal" from the right-click menu

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked]
"{9F156763-7844-4DC4-B2B1-901F640F5155}"=-

Same thing from a command prompt

Run in an administrator Command Prompt or Terminal.

reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked" /v "{9F156763-7844-4DC4-B2B1-901F640F5155}" /t REG_SZ /d "" /f

Undo:

reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked" /v "{9F156763-7844-4DC4-B2B1-901F640F5155}" /f

Terminal Preview has its own entry; block it too with the value {02DB545A-3E20-46DE-83A5-1329B1E88B6B} in the same key. Sign out and back in if restarting Explorer isn't enough.