Folders and shortcuts

I have stated to use Musescore 4. It looks fine but some thing is not workin. When I try to add a note A into score, the cursor just moves into the start of the bar. I have now creates a Shift+A shortcut for it. However, it's hard to remember the Shift every time. All other sites are ok. I hope you'll release the shortcut A as it describes in default shortcuts.

An other thing is, when opening scores to for editing. All scores open I new window, not in subfolders of the current window. I can live with it but I'ts a bit inconvenient.

I use Musescore in Mac Book Air.