Download or clone the repository. Open up the ExampleProjects.sln, on the project sidebar on the right, right-click 354Bot and click Build. In the repository directory, in the Release folder you should find 354Bot.dll. Take note of where it is in the file directory.
Assuming you've installed BWAPI, navigate to where you've installed it. Inside the BWAPI folder, you should find the Chaoslauncher. Open it, and you will see several plugin options. Check the BWAPI 4.4.0 Injector [RELEASE] and, if you want windowed mode, check W-MODE 1.02. Select BWAPI 4.4.0 Injector [RELEASE], then click the config button. It should open up a notepad file. Scroll to the [ai] section, at the top and look for the ai directory. You should see two lines next to each other with ai= and ai_dbg=. Change the first directory to wherever the 354Bot.dll file is located on your computer. Assuming all that has been done without a hitch, the agent should hopefully be ready. Click Start, and feel free to test the bot out in Singleplayer Custom Scenarios. BE SURE TO SET YOUR FACTION TO TERRAN.
If you'd like to play against it, open the Chaoslauncher - Multinstance.exe. Launch one window with the injector enabled, and another without. Then have both windows navigate to Multiplayer, then LocalPC, then create a game, and join it with the other window.