Problems with SceneManager

Hey guys I am still fairly new but I have completed a fair amount of projects and something that has bothered me to no end is that I can not use the SceneManager from the import/using at the top. I have tried so many times and I just get an error. The other way using "Application" says it is obsolete yet I can't use the other way.

Please don't suggest putting:
"using UnityEngine.SceneManagement;"
because I have that at the top but I still get errors saying:
The type or namespace name 'SceneManagment' does not exist in the namespace 'UnityEngine'. Are you missing an assembly reference?"

I do not know why this happens but this has caused no small amount of minor headaches and I can not seem to find a fix because apparently people just added the "using UnityEngine.SceneManagement;" to the top and it fixes or they updated and it fixes but I am fully up to date on 5.2.2f1. Please help me.

There is proof of the problem.
https://gyazo.com/50fce4a6950d65239c95f1150a66ecdc

 

The latest version of Unity is Unity 5.4. Can you upgrade tot that version and try again?

 

Well when I click "check for updates" it says I have the latest version installed.

 

5.2 doesn't have any of the scene management stuff in it so it would make sense that your using statement is barfing. Now - why you're getting messages about Application being deprecated is beyond me.

Sounds like a fresh install of 5.4 or 5.3.x is in order.

 

It has been known to fib a bit.

 

Okay well the fresh install definitely did fix it so thanks guys!