This mod uses it to freeze the value held in the game's memory where the settlement limit is stored. Cheat engine has been around for many many years, and it modifies software's memory, which is something viruses commonly do. This is a false positive as the mod uses cheat engine to function. I keep it up in case you're one of few people who do have a release version. It probably doesn't work unless you have an early version of Fallout 4 that hasn't been patched. It was used widely for a while, even by Youtuber's like Robbaz. It was the first solution to remove the settlement limit. I want to clarify a few things that have got out of control over the last few years: