When solidworks file is selected in windows explorer right click on the taskbar button cannot close the explorer window.

I doubt that the tweaker has something to do with this. But there's an easy way to check it: close the tweaker, and Shift+right click the problematic button. See whether you still have this issue.

Hello!
When i close the tweaker, shift+right click then close - the window closes properly. But I've had searched for some program that interferes. I have uninstalled ClassicShell that i use and the problem is no longer present. Then it turned out that a checkbox in Classic Explorer (status bar, show detailed info on single selection) is making the trouble.
I wouldn't had resolved the issue without you! Thank you very much for your input!