I installed v5.1 about 4 weeks ago and fell in love with it (I even sent you a contribution via PayPal). However, suddenly today, v5.1 started behaving erratically, in spite of several computer reboots and re-installation of the software. Specifically, it would become very slow scrolling to the next photo in the file, sometimes taking 5-6 seconds to advance. Also, when I tried to delete a photo displayed in the software, I got the message that "it couldn't delete it because it was open in ImageGlass". Duh, of course it was. When I went to your website to post the problem, I discovered that v5.5 is now out, so I downloaded and installed it. It solved the problem. So, what caused v5.1 to suddenly behave erratically, and is there any chance that v5.5 will do so in the future?