How to remove backdoors

Its best to look at the lua code and search for RunStrings or SteamIDs (and sometimes for HTTP when youre suspicious, but not all HTTP are backdoors). I use Visual Studio Code (free) for this. It has a function to search through an entire folder/addon. When you have found the backdoor, just remove the line(s) of code. Most of the time its just a single line of obfuscated code at the back of a file with a RunString in front. But keep in mind that not all RunStrings and SteamIDs are backdoors. But if it looks long and weird and you cant figure out what it does, just remove it.