black ops 2 GSC studio not working

I go to connect to current steam process and that is successful. I then go to editor to inject a compiled script (gsc) and the box opens up but there is no "add GSC" or "inject GSC" button like there is suppose to be. I tried reinstalling it TWICE, and no creating a project doesn't help it either.
https://imgur.com/gallery/imRbMyN

(It only works on solo for steam version/custom games)
When you open GSC Studio, make sure you create a new project in editor and select the right mode.
Delete all of the code that shows up.
Connect the steam process.
Then under editor select "Inject a compiled script file".
Click "Add gsc to inject...".
Choose the folder.
Then click "Inject list..."
Done.

Try Running GSC As Admin.