Ok, before I discuss the crash, let's discuss the lack of an image handler here in this forum.
I took a screen shot of the crash and can't post it . 'Image' is only looking for a url link to an image. And if you try to use My Media it doesn't have the ability to upload the image.
Using Affinity for Windows Beta I was able to crash the help file consistently. After opening the help file and selecting a category and opening the help file if you use a down arrow to scroll through the text it through an Exception error and could not back out of the crash. Affinity knew when I restarted the program there was a crash and asked permission to send a crash report. But after agreeing I assumed that a window would pop up to add information as to what had happened prior to the crash. No such window. I've attached the file, but had hoped to embed.