As far as getting it to work, I did a clone of jsreport-studio to a directory and then just ran 'npm install' and that reported errors. Maybe I messed up and that isn't a stand alone app that can run?
it should work, if you are still curious about jsreport-studio.. what version of npm do you have? we use npm5 all the time and the install works always, are you using npm 5 too? also maybe it would help more if you share the exact error message that you get after npm install.