According to the official system requirements released by the developer, this application is compatible with Windows XP Service Pack 2 32bit. As a matter of fact, this version of Windows is actually recommended to be installed for maximum compatibility. Technically, there shouldn't be much of a difference between SP2 and SP3; and SP2 applications don't have major problems running in SP3. On the other hand, there is no other version released by the developers that works exclusively for SP3. However, you should try to install it again using the download from the official website.