There are some limitations in the software catalogue. These actions aren't implemented (yet). It is on our radar, but the we have quite a few issues, so I don't know when it will be fixed.
In the meantime, I can delete the duplicate for you from an admin panel, but the first two tasks are not directly doable at all at this time.
So, to recap, if you wish me to, I can delete landmarkreg without the dash, but that will leave the landmark-reg app untouched.
Would that help?