Should be fixed in v4.5.10.2 beta. Please try it.
I'm closing it as a duplicate of:
http://tweaker.userecho.com/topic/314270-icon-of-closed-window-blocking-active-window-to-take-its-spot-in-the-taskbar/

Should be fixed in v4.5.10.2 beta. Please try it.

Please try the latest beta version.

Looks like a duplicate of:
http://tweaker.userecho.com/topic/314270-icon-of-closed-window-blocking-active-window-to-take-its-spot-in-the-taskbar/

Closed due to a lack of feedback. If still relevant, please provide more information.

Since v4.5.5, you can use the Mouse Button Control advanced options to minimize/close all items of a button group.

If that's still an issue, please provide more details. Closing for now.

If that's still an issue, please provide more details. Closing for now.

I believe that it was fixed in v4.5.10!
Thanks everyone for helping me to solve this long-standing bug.

I assume that I know what the issue is. Versions until 4.5.10 didn't check the server status while updating, so if the server was e.g. overloaded, the tweaker tried to execute the file which contained the server error message, instead of the actual setup file. As that's not an actual executable file, Windows reported that it cannot be executed in a 64-bit environment.