Can not start DiffPlug "No lockfile found"

I want to test DiffPlug but i can not make it to start

Ubuntu 20.04
Downloaded and extracted the files into ~/DiffPlug

Try to start DiffPlug in terminal by calling the dp command in terminal
~/DiffPlug/: . dp

No lockfile found at /home/josef/.diffplug/.lock
Can’t find a running or installed DiffPlug.

Makes sense since it the fist time i run the program and there is no file “/home/josef/.diffplug/.lock”

What should i do?

Br Josef