sonlight

Hi, I've been using Aperture for several years, but need to replace it with a new photo editor. I downloaded the trial of Affinity and wanted to try out the program before buying it. I'm watching the For Beginners video on Vimeo and trying to duplicate the actions on my own photo. I got to the Inpainting Brush and Vignette, but nothing happens when I try to apply them to the photo. I was able to use the other adjustments mentioned before this on the video. What happened?