Hey, welcome.
ReShade is out and in Beta now and is packaged with SweetFX 2.0.
ReShade has numerous benefits over the old injector and allows for much better effects to be possible (AO,DOF with other shader packs).
I'd suggest checking it out it comes with a nice installer that you just direct to the games .exe and it does the rest for you. (except for editing the colors/effects of course).
The only downside of ReShade is currently some anti-cheats pick it up as a cheat. Due to the fact that's it's not known widely yet and thus not white-listed. Sweetfx 1.5.1 uses an older injector that is whitelisted by almost every single game in existence.
Lots of games work just fine with Reshade though, but knowing that there could be a risk is important. You need not worry for any single player game though. I use it for some online games as well, it really depends on the anti-cheat (smaller, less mainstream methods may think it as cheating, like Battle-eye in the Arma series).
You can check out ReShade at:
http://reshade.me/ (go to downloads)
Download the + Sweetfx 2.0 if you don't want all the shaders from other packs like Master Effect Reborn, and GEMFX.
Also I forgot i'd like to add that some games straight up don't work with the old injectors and ReShade is needed for them. (some new games don't work)