MuseScore doesn't run anymore?

Hey there,

I got a problem. You see, I have a chromebook and I had musescore running before only about a month ago or so. Now I was forced to deinstall the linux tool, therefore musescore was gone, too, of course. But now I just reinstalled it and it just doesn't start. Everything went fine and just as the last time, when I installed it (I used the terminal), and when I try to start it, it indicates that it's loading, but from there nothing happens anymore. Just loading, but not starting.
So I tried uninstalling both MuseScore and Linux and installing them again, but again, same result. Even after several restarts of the computer - no change of result. I even tried to use the download data instead of the terminal but it too didn't work.
I checked, wether there was an update for Chrome OS, but that too was not the case. I have the newest version installed.
So does anybody have an idea what else to do? As I said, it worked just fine only a few weeks ago.

Thanks in advance for your help
Kat