How to load .dmp file to database using neo4j desktop app

Hi, I am running on Ubuntu 18.04 LTS and I am using desktop version. It works great but I am wondering if there is any way to import .dmp file using desktop app. I've also installed shell version but I am a newbie and can't really operate it.

So what I need is that I need to import the .dmp file with:

neo4j-admin load --from=<file.dmp> --database=<mydb> --force

I am having some issues with ports when I use neo4j prompt. The command above works but I have no idea where it puts the data and how to access it. What I want is to maybe import it to one of my existing graph dbs which I can access through desktop app. What would be the steps to acquire that?