bit offtopic but w/e, "Context Menu New AutoHotkey Script.reg":
Windows Registry Editor Version 5.00

; I removed it, so this will add it back
[HKEY_CLASSES_ROOT\.ahk\ShellNew]
"Command"="\"C:\\Program Files\\AutoHotkey\\UX\\AutoHotkeyUX.exe\" \"C:\\Program Files\\AutoHotkey\\UX\\ui-newscript.ahk\" \"%1\""

; I copied the template from %ProgramFiles%\AutoHotkey\UX\Templates to %SystemRoot%\ShellNew, took out the "v" of "v2.0" inside the script, removed the multi-line comment and renamed it.
; So this will remove the value "FileName"="CustomTemplate.ahk"
[HKEY_CLASSES_ROOT\.ahk\ShellNew]
"FileName"=-