Alcatraz in Xcode 7.1

Question

Note that from Xcode 8 Alcatraz no longer works Editor Extension Tutorial

---

I am unable to install Alcatraz for Xcode 7.1

According to

Answer 1

I did the same as Ryan suggested and it didn't work. Then I realized his has:

defaults delete com.apple.dt.Xcode DVTPlugInManagerNonApplePlugIns-Xcode-7.0

Since I am on 7.1 I changed it to

defaults delete com.apple.dt.Xcode DVTPlugInManagerNonApplePlugIns-Xcode-7.1

P.S. I would make this a comment but I'm too much of a noob to make comments 3;(