Side bar in musescore is gone

I need help but I didn't know which forum to put this in. while I was composing a new song, the left side bar where you can change the time signature, key, add tempo, etc. disappeared from my screen. I tried restarting my laptop, I updated to the latest Musescore and I even deleted it and downloaded the software all over again, yet it is still gone. I really need help getting it back.