I'm fine with JSON configs.
I hate that I can't remove projects from the list. Sometimes i do very quick jobs (couple of days, max a week), other times i do long projects (couple of months) and, finally, i do recurring projects (some maintenance). I hate
to have 30+ projects in the project list.
I guess few buttons on the bottom part of the sidebar would help a lot: new file/folder, new/save/close project.
I remember that was already a long(ish) discussion couple of months ago with no conclusions