Compress 2011 is an old and unsupported applications. However, you can access the developer's website to see the new version. You will have to get in touch with the sales team in order to obtain a pricing for your needs. The software might include other modules and features versus the version released 2011, therefore it's best to check it out with them before you make a purchase.
If you know how to work with this kind of programs, I suggest you check Solidworks as well. That application is outstanding when it comes to 3D modeling, analysis, structural analysis and more.
