Clicking toolbar menu button does not close expanded menu?

If I click on a toolbar-menu-button, it will expand the menu.
Suppose I am done looking at the expanded menu.
I would like to click the button again to close the expanded menu.

Instead what happens is that a subsequent click causes the menu to be re-opened. I cannot close expanded menus unless I click areas like the desktop or empty toolbar space.

How can I set the toolbar-menu-button to also close menus that are open?

Actually TLB works like you've described. The second click on the toolbar button must close all menus. I guess this is a bug in your case.

Please can you make a backup of your toolbar and send it to me (support@tordex.com). I'll check the behavior of TLB with your settings.

To make backup, open TLB settings->Options and click backup.