Once you get it running, the software is excellent . . . The program version you need is determined by your installed version of Java, not by your hardware or OS version. If like me you followed the recommendations when downloading Java, you probably have the 32-bit jre installed on your 64-bit computer because you use a 32-bit browser. Try downloading the 32-bit GifApp, or installing the 64-bit Java; Oracle claims both versions can coexist on a 64-bit machine.
Won't run on 32-bit Windows!
Cannot find java VM DOES NOT WORK !! Tried: java -classpath .\lib -jar GifApp.jar does not work either, cannot find libraries