Zoirot2W, ensure that your settings in Flawless Widescreen are correct. That did the trick for me.
1) check the display Detection settings: here are my settings which do work on my ASUS ROG SWIFT PG348Q (34", 3440x1440, 21:9) with a GTX 1080.
2) configure a valid hotkey. I use for example the following:
3) When you are in-game in MW3 set the resolution to: 3440x1440
4) Verify that the fix is running. the menu should change when you press the defined hotkey (in my case "L"). if it's not working, jump to desktop and check the flawless widescreen app
Sorry, friend. I can't zoom in your picture.
I downloaded the x64 version, I follow the setting and there's nothing changed in Status Window. It's still searching for the MW3 process.