[Brass_Max3]

I am a very new User of MobileSheetsPro on a new Boox Max3.  I am attempting to add annotations to a piece of sheet music.  When I enter the annotations editor, my screen is frozen and I am unable to make any tool selection.  I cannot cancel or save.  Previously, I was able to get into the editor, but when I tried to save my changes, it seemed to freeze the application.  I was forced to perform a hard reset.  Any suggestions would be appreciated.