This addon and Orbiter version are quite old. What exactly are you trying to do?
Orbiter 2016 and STS2016 or SSV are probably better options for almost everyone unless you're simply interested in Orbiter/addon history. But know that support for stuff this old is probably a bit sparse these days, you may need to do a bit of troubleshooting yourself.
If you're just after a shuttle addon I would go with STS2016 or SSV.