T-Clock's calendar does not appear when I left-click on the clock (likewise if I set a hotkey for the calendar).
I'm using T-Clock Redux 2.4.3 on Win 7 x64. "Use T-Clock's Calendar" is enabled, and single left-click is configured as the mouse trigger. If I disable "Use T-Clock's Calendar", then the Windows clock pops up with a left-click.
The only program files I am using are Clock64.exe, then in a \misc\ subdirectory: Options.exe, T-Clock64.dll, and XPCalendar.exe. When I moved the latter file to the parent directory, left-click gave an error message that it was missing.