Some new purchasers are reporting errors that are causing the game not to launch - a fix is uploaded and awaiting approval.
Our apologies to those who were excited to grab the game and then couldn't play it, we know how that feels. We have a patched installer uploaded to Desura and are just awaiting submission approval and release - we expect it to be up early this evening.
We'll keep you updated if things change or as they progress, just hang tight.
Update: A fix patch just went live, please update right away!
Update: Apparently the internal Desura installer may still be acting up, but the standalone download should work. (Still working to fix the Desura installer!) If the Desura installer gives you an "invalid exe" error, uninstall and use the standalone MSI installer instead, that seems to be working. Sorry all ... never had this kind of trouble before, naturally it happens during a bundle. =/
Update: Ok, installer seems to be fixed ... everything should be good now. Those experiencing the issues will need to uninstall and reinstall.