(Courtesy DavidDurlach.com)

Create a single-keystroke Windows Explorer 'Duplicate Tab' TidyTabs command using FastKeys

tidytabs tab dup via fastkeys screen capture

Copyable text to paste into Fastkeys Shortcut Send window:

SendInput {Escape}^l^c^#t{350}^l^v{Enter}

Duplicate current tab in Tidy Tabs

ahk_class CabinetWClass