Ugh. The "OS Recent Files Integration" blew up my dock icon so now instead just showing open windows, it's filled with random files I happened to touch. How is

Ugh. The "OS Recent Files Integration" blew up my dock icon so now instead just showing open windows, it's filled with random files I happened to touch. How is this useful? I'll edit 20 files in a sitting regularly. Also, it made looking at open app windows a complete mess - giant icons of text files, and the minimized window I'm looking for just sorta shoved into a corner... Useless. So I turned it off in the settings, cleared the recent files in the menu, but now there's a bunch of files just sorta stuck in the OS recents... Anyone know how to manually clear recent files from an app in macOS?