4.2 brush color won't change

Hello, I have recently downloaded 4.2 and I can’t get my brush color to change it shows the color I have selected in the box but when i draw it only shows as black the layer shows the color but not on the stage? I also crash when I try and draw with the pencil tool not sure if the two are connected but any help would be great.

Try clicking on the red box above the HSV sliders and choosing the colour
from there. Just moving the sliders after selecting the tool will not change
the colour (I think it has something to do with where the mouse focus is).