If you're feeling terse, you can omit the CDD and the second percent sign.

Hunh, so it doesn't. So much for my little theory.

SWAG: The filename completion sees a filename beginning with a dot, and assumes it has a relative pathname?

But only the one under HKEY_LOCAL_MACHINE, not the one under HKEY_CURRENT_USER.

And in answer to the question you did ask: After variable expansion, your command becomes either ECHO OFF or ECHO ON. These two words are handled specially by the ECHO command; see HELP ECHO for details. To work around this ancient misfeature, use a period instead of a space to separate the...

Not an answer to the question which you asked, but... Have you tried %@option[direnv]? P.S. Note that %@option[direnv] returns "Yes" or "No", not "On" or "Off".

FWIW, the exact same thing happens if you disable a command with COMMANDS /D WINDOW, then open the OPTION dialog and click OK. This is nothing to do with SETDOS in particular.

No problem. I'd rather do this, than the actual useful work for which I get paid....

I'm not sure how OPTION would know whether you meant to disable a command temporarily or permanently. All OPTION knows is that the command is disabled now. If you want to set options for future shells, don't use the OPTION dialog. Use Options / TCC on Take Command's menu bar.

Try %+ It's been deprecated for a while now, but as far as I know it still works.

4DOS was the original. NDOS was a licensed, somewhat hacked-up offshoot bundled with the Norton Utilities. Useful, in its day, but it was a very early version and I don't think it ever got any updates.

Here's a quick hack. No documentation; I trust you can figure it out on your own.

This kind of thing I'm always tempted to do with a plugin — I'm not a regex maven. How exactly do you define an ANSI sequence? ESC [ followed by a series of printables, ending with a letter?

@WINSTATE?

I just updated to Take Command v32.00.15 and double-checked the Start menu shortcuts. The installer created shortcuts to both TCMD.EXE and TCC.EXE. The way the Windows 11 Start menu displays them is pretty confusing, though. The installer creates a "TCMD32" folder and puts both shortcuts...