To solve this problem you have to uninstall and then install the software again. You can try to do this the usual way by going to Start -> Control Panel -> Add/Remove Programs (Windows XP) or Programs and Features (Windows 7). However, an error may appear. In this case, you can use a third party tool to remove the software by wiping out all traces of its presence from your system like Revo Uninstaller. After that, you can try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
Another thing that you can try is visiting the following web page that the software developer created specifically for this problem. Also, you may want to visit the following official web page 1 and web page 2 for more related information regarding this problem.