VSCode autocomplete doesn't work

Downloaded four extensions mentioned here along with C#: https://code.visualstudio.com/docs/other/unity#_unity-extensions

Code does not autocomplete, seen here: https://imgur.com/NKcGHGp

I tried reinstalling all extensions, reloading VSCode and reloading Unity, no success. Other mentions online I found for VSCode are not exactly my problem. Even stuff like "GameObject" is not recognized.

The only other stuff in my project is a small library from: https://github.com/PouletFrit/csDelaunay
2018.3.14f1

 

Fixed. Restarted VSCode after downloading: https://www.microsoft.com/en-us/download/details.aspx?id=56119