Cannot configure Exec Binding via PaperUI

I just installed the exec binding via the PaperUI. After that I wanted to configure it, but don’t know how.

When creating a Thing I can choose exec binding from the list, but this results in an empty page shown to me:

Nevermind, rebooting solved the problem.

As far as I know the only way to configure the commands the exec binding should execute is to configure things in a text file in OpenHAB’s configuration folder. After creating the things there they should appear in PaperUI and allow binding to items.