/path/to/paperthrow Not sure where it is? Try which paperthrow or if all else fails find / -name paperthrow -print Probably not the best way, but I've been doing that for 25 years and it works for me
find / -name '*leafpad*'
Also, be careful about shutting the terminal you used to initiate the launch because you'll close both at once - unless that's what you want. Not sure if you can spawn the new programme so it's uneffected by whatever goes on in the terminal.
nohup ./some-text-editor myfile.txt &