Lots of work, no success

I installed this based on the good reviews, but I have been dealing with it for over two weeks now, including support boards, and still don’t get the watermark on my images. Latest version of WordPress, latest version of Image Watermark — at least three that became available and downloaded in the past four days — and nothing works. In the many hours I have spent downloading, fiddling with settings just in case that was a problem, etc., I could have manually watermarked hundreds of images. Very, very disappointed.