Question / Help Colour Key and Select Region Window Capture

On OBS v0.651b while using a window capture you could chose which section of the window you wanted and also use a colour key to remove everything of that colour, but on the new OBS 0.11.1 i cant seem to select which bit of the window i want showing or i cant remove the white background? anyway to do this currently or what?
How do i find that pick screen colour? would this work with a green screen then to get rid of the green bit? Also can you select the window region or do you just have to use the whole window region
Right click on your Source > Filters
There you can add Chroma Key, Color Key and Crop.

You can't specify a region for window capture but you can use the crop filter for getting rid of unwanted stuff.