Windows provides Shift+Left click as an alternative shortcut to open a new instance.

If you'd like to specifically use Ctrl+Middle click, you can configure it with the Mouse Button Control advanced options. Refer to the help file for more details.

Try out 7+ Taskbar Numberer:

https://rammichael.com/7-taskbar-numberer

The request is very specific, so I'm reluctant to add it to the tweaker. Meanwhile, you can have a similar functionality by using this method to run nircmd with the following command line:

nircmd win togglehide class Shell_TrayWnd

Meanwhile you can have a similar functionality by using this method to run nircmd with the following command line:

nircmd win min foreground

Also, you can use Win+number to minimize a maximized window, but you need to keep track of the window location.

That's a known explorer bug which existed since Windows 7:

https://superuser.com/questions/61833/windows-7-taskbar-icon-highlight-sticks

Fortunately there's a simple workaround.

For Windows 7, it was enough to bring up the classic context menu with shift+right click.

For Windows 10, I noticed that sometimes a shift+right click fixes it, and sometimes it needs to be just a right click.

It can be nice to fix the issue with 7+ Taskbar Tweaker, but since it's difficult to reproduce, and since there's a simple workaround, I never really bothered. If you find a way to consistently reproduce the issue, please let me know.

That's a limitation of Windows. The "Open with" feature comes with Windows, and can be used without the tweaker by holding Shift while dragging the file. The tweaker just makes explorer think that Shift is being pressed.

Windows doesn't allow to pin items on secondary taskbars, so it looks like the "Open with" feature gets disabled as a side effect. It might be possible to fix this with the tweaker - I might look at it when I have some spare time.

Since that's not a bug of the tweaker, I'm changing it from "Bug" to "Idea".

I don't really know how to to disable Alt+Tab.

There's this document, but it's about Win+key hotkeys:

http://www.geoffchappell.com/notes/windows/shell/explorer/globalhotkeys.htm

There's also this guide, perhaps it can help:

https://www.howtogeek.com/194811/how-to-prevent-the-windows-key-alttab-and-sticky-keys-from-ruining-your-gaming/

Igor, can you please post a screenshot of the taskbars from both monitors, while they are as narrow as possible?