Kcptun is a GUI program for kcptun on macOS.
v1.4
download here
and unzip file, Drag Kcptun.app to Applications file
drop Kcptun.app to Trash
then open Terminal.app and input those commands:
rm -rf ~/Library/Preferences/MacOS.Kcptun.plist
rm -rf /usr/local/var/log/kcptun
rm -rf ~/Library/Caches/MacOS.Kcptun