Check out your Admin Dashboard, which can by found by clicking "Admin" on the bottom toolbar -- it has links to all your new tools. Please let me know if you have any questions, and good luck with your new (old) wikia!
How can you edit the menu bar above in the desktop version? Beside the On the Wiki tab, it's the Popular pages tab with the Most Visited Articles and so and I want to change to as Series tab then put in there Anime, Manga, Characters, etc.
Hello. If you go to the "Contribute" button and click the arrow to get the dropdown, there is an option to "Edit Wiki Navigation". That will allow you to change the menus. If you are not sure of the format, you may want to check out this help page.