Termini aren't shown in MultiTerm 2019


I'm not exactly sure how the program should work, but to my understanding on the left side in the "Termini" window it should show me all the entries that are in the terminology-database. See:

My database has 6 entries, shouldn't they be shown here? Or what am I missing? Because currently I can only go up and down by 1, through all my entries. 

Thank you very much.