The specific file name you mentioned, Batman.Arkham.Knight.READ.NFO.CPY.part01.rar , refers to a split-archive release by the group that was notable for cracking the game's Denuvo protection.
If you need to transfer a save or back one up, the save location for the CPY version usually differs from the Steam version. It is often found in: C:\Users\[Username]\Documents\CPY_SAVES\CPY\208650 Batman.Arkham.Knight.READ.NFO.CPY.part01.rar
The PC release of Arkham Knight was notoriously buggy at launch. The is the gold standard for fixing issues common in these older releases, such as: The specific file name you mentioned, Batman
Since that release, from the game. It is frequently available for a very low cost on platforms like Steam or included in subscriptions like Xbox Game Pass , which provide a much more stable and updated experience. The is the gold standard for fixing issues
The original files were locked at 30 FPS. You can change this in the BmGame\Config\BmSystemSettings.ini file by searching for MaxFPS .