About issue 1: Maybe I have to explain a bit more. I understood that testing was required to test with the normal expected functionality of MS, to get it ready for an update through the repository... So, I compared it with the normal functionality. Normally, I can, when I am on the website of MS, download a score or right away open it. The latter option is not working and that is where this issue refers to. I did not realize or understand anything (yet) about 'snap', I just installed it, like on top of this page and thought it would be comparable with normal functionality. Otherwise I don't know what is normal for 'snap' or normal MS functionality. I probably have to get into what snap is and what it does and mean to go any further then, I guess.
ad 2. Thanks. I can't wait to see and try it. You know, a main thing that I am doing this has to do with the fact that the app image of 2.1 doesn't work with extra keyboard signs link ö, ä, ï etc. The standard keyboard combinations don't work. So, every time one wants to enter such a combination, one has to use the extra input panel to add that as a symbol. That gives major delays in entering lyrics. So, I was looking for the normal install of 2.1 and I got this link through the mail from MS support. So, I am willing to test to get this working asap, if that's the goal.