Thank you for the report. That was indeed an oversight, and should be fixed now.

Please provide more details. What doesn't work?

Implemented as an advanced option, disable_items_drag, in v4.5.10.

Automatic updates are available in v4.5.10.

Fixed in v4.5.10.

Try the disable_items_drag advanced option in 7+ Taskbar Tweaker v4.5.8.12 beta.

What do you suggest? To move the applications every time the taskbar is shown?
Also, have you considered disabling taskbar transparency?

Currently, you can do this with Taskbar Inspector: double click on the AppID, right click and choose to close the windows. Not super-quick, but as the action is not very frequent, I think that it's good enough.