Paid version doesn't fully work – Blur Photo Background Review

I paid the $1.99 to remove the watermark on photos I edited on this app. When I use the blur tool, what it shows in the preview of the photo isn't how the photo was edited. For example, if I blur a section of the photo everything looks fine but then when I go to save it the photo it's barely blurred. It's like if the blur looses some of its effect while it's saving. This is definitely an issue.
Review by Jay R (NYC) on Blur Photo Background.