Musescore 4 opening score as blank

Mac OS Sonoma 14.4.1;
Reboot did not work;
When I open the composition it says version 4.3 then immediately says this file was saved in 3.6.2, which seems strange to me because I had created it the day before;
The only option I have is OK but it does not tell me to what I am agreeing;
Then it has the name of the composition and a blank page;
I do not know how to double click a score in file browser;
I do not know how to uninstall and do not remember how to reinstall.