Pro/Desktop

I know I shouldn't really post this here, but I don't know where else too... I need a download link for "PTC Pro/Desktop 8" for a project at school, and I can't find one anywhere. What's happened? Has PTC just decided to bin it, because they have it on the PCs at school and it's really helpful. Sorry if this is a stupid question, but I just need some help. Thx in advance