The recent topics HTML is either under main_modern_layout.html / main_modern_lcell.html
either main_last_discussions.html / main_last_discuss_cell.html
- depends on the value of the $startPageModern
option you have.
Here's a quick instruction how to search in files
comfortable. View the source of the page, select some fragment of the code and you should find a place where it's located.
You may upload images using the local File Bank tool; click the
icon located above the message input area, the outgoing link will be allowed to post.