Hi There,
# It seems that your files & folder remain the same as the previous. We did not change anything. Maybe you don’t know about file/folder structure. If so, you can learn about cPanel file/folder structure from google search. Also, you can get about WordPress file/folder structure there. Else, please contact your hosting provider.
# You can add/Remove categories from Dashboard => Advertisements => Categories.
Here is screenshot
https://prnt.sc/1qywn29
Thanks