The tool removes black bars from the game at 21:9, 32:9 and 48:9 resolutions.
Download and unpack the archive using software like 7zip or PeaZip. The password is pcgw
Launch the game
Launch the tool
Press the "Enable" and desired resolution keys as instructed by the tool
While in the game, press alt+enter twice or briefly switch to a different display mode (e.g. borderless)
Tested the latest Epic version at 2560x1080, 3840x1080 and 5760x1080 on a single monitor.
The stretched loading screens and potentially stretched FMVs are known issues, so is the false-flagging of all trainers by some anti-virus software. The window mode switching requirement is also undesirable, hence the version number!
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