Damaged download content

I have been trying to download [Edit] for Macintosh for a couple of weeks and everytime I try to unzip it I get an error that says "The archive may contain damaged content" and it stops opening??? How can I get this program to download or install properly??

Thanks for your help

ILLEGAL ACTIVITY
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Edited to comply with the House Rules.
Warez, copyright violation, or any other illegal activity may NOT be linked or expressed in any form.