Tabs whatever

Hi everyone,
Is there a way of closing all the tabs (songs loaded into Musescore) at once? For example, when I have 12 songs open in Musescore, I must click each tab to close the song. The problem is, the tabs are all different sizes. Some GUIs lock the tab size so you can hover the mouse on the first tab's X, and then keep clicking until all the songs are closed. Currently, we must shift the mouse back and forth because the X keeps moving depending on the size of the song title. Just curious.
Thanks.