I use it as a default on my Windows 8.1, because the Windows integrated viewer doesn't support GIF animations. It would be great to have an option to allow only one instance to run (so, if I double-click on a new .gif file, the same instance should be used). Instead, when I'm viewing some gif file, it opens numerous instances... that's not convenient.
EDIT2: 1.4.7 worked! But, for some reason, the file plays at a slow rate. The visual isn't fluid. It's quite "jerky"? Changing the input in the field on the right corner doesn't make a difference. EDIT: I tied out v.1.4.5 after receiving a recommendation by email. "Error: Object reference not set to an instance of an object." Same error message for different gif files. PREVIOUS text: I went through the tedious process of registering just so I could post this review. I got this app amoung many others on my win7 system. This was the only one that worked like a charm. The gifs could even be expanded in size unlike in other apps where the gif size remains static. Unfortunately this viewer does not work on win8 :( really sad. Had to settle with one of the lesser wares instead. I'm sorry but this means (-1) on the perfect score. PS: sourceforge, can't you guys let facebook/google+ users post comments rather than have us register here specifically?