I’m getting a black circle when I use the lens flare slider. Bug? or my background?
Hey @vjaramillo_cg , I’m sorry to hear about that. This sounds like a graphics card driver compatibility issue. Could you please update your graphics card driver? You can download a new driver from the Nvidia homepage or from the AMD site accordingly.
Please be aware, that Windows often display your graphics card drivers being up to date, even when it’s not the case. Therefore we advise that you do not upgrade your drivers via Windows Device Manager. 
In case this procedure doesn’t resolve your problem already, could you also make sure that you’re using our latest release, which you can acquire via the [About…] window → “Visit download area”?
Let me know if this resolves your problem!
