This was posted publicly back in 2012, and may/may not have anything to do with OP's post as I (obviously) cannot download attachments. Judging by OP's post history, this seems to be the full package that was leaked that contains the whole qinvent.com Dezender source
dezender.c is in work\php\Zend\dezender folder
Code:
Download: hxxps://yadi.sk/d/GNkaucI4To2pk
Password: sy5sgwv4ms2fpvmHt7Rvcrc2am1Eu8fOIUUkgcmzJXTE3HYhf3vDZI68dhWSTXAekBpZ06XLTZqTY4Qs1zql09wXp5SYYrCz00qA