Can I convert scores I find on musescore to shape noteheads as I can on the windows download?

First of all Musescore is a miracle and I can't believe the stuff I've been able to do on the free version. Thank you to anyone involved in its creation and upkeep.

Question, though: I googled up a mscz score I wanted to put in four-shape noteheads, a thing you can do on the version I use all the time. (It is the stupidest thing to put in shapes. It's Janacek. But there were reasons.)

It looked like to change things about the score, I had to spring for the pro version, which I did. I've been using the free version for a year or two and feel like I owe it to chip in. But so I bought a year's membership and then it said to make changes I needed to access the score on my ipad.

So I logged in there, and got the score, and I was able to change keys, which is neat, but there appear to be very few other edits you can make on the ipad version. Are these just two separate things, with a sort of input program I'm using on my laptop with lots of editing powers and a viewing app I'm using on my ipad that doesn't have those?

Thanks for any help on this silly question.