One way to "clear it out and start over" is to import a blank file. Use Notepad (or any other text editor) and save a blank file named "blank.txt" (the name's not important, but you want the .txt extension). Then open the Extra Watchlist window, hit 'import' and choose your blank file.
Can you please send me more details (via email or Discord) about the file you uploaded that resulted in "garbage"? Thanks.
