Topic on Talk:Saints Row: The Third Remastered
Which mod you tried? The old one in this talk page, or the FOV Editor linked from the article?
In the case of latter, I've looked the source code of FOV Editor and I'm certain it doesn't work if the tool cannot find "SaintsRowTheThird.exe" in the same directory. If SRTT:Remastered's exe file is NOT named like that, maybe you can rename it temporarily to make the FOV Editor work.