I have uninstalled/reinstalled, but when it gets to building the preview the program just hangs. Any suggestions?
There might be an error with the application related to compatibility. If the software is installed, try running it with Administrator privileges. In many cases, this simple trick works and allows your program to open successfully. However, you might have to use another application for countdown purposes, because this one isn't supported anymore. In fact, it's actually discontinued and the official website doesn't exist anymore. You can use the apps in the database of Software Informer to download an alternative: http://software.informer.com/search/create+countdown