The build I was referring to was the engine itself, not a project. Specifically you could return to version (and have it locked at) 5.4.1 as per your original request. However I was also noting that the performance issue is not likely from the hotfix itself, but likely 5.4 in general.
This thread has a number of workarounds/solutions to the possible causes of the issues stemming with 5.4 originally that may help: