Injector is a ENBSeries tool for walkaround problems with Optimus, XFire, EVGA, D3D Overrider, Afterburn, Steam and other software which prohibit usage of d3d9.dll wrapper (ENBSeries mod). By default it "inject" enbseries.dll in to processes under [TARGETPROCESS] category of enbinjector.ini configuration file. If you have renamed executables of the game, add/replace them to enbinjector.ini.
In future all versions of the mod will have support of injector and injectors will have additional features, per game.