a hacker may decode this algorithm.(maybe)
*in homepage total .js files size is : ~700 kb and this effected to website load time.
*Also everybody can see file download statistics.No need detailed statistics for every file and for every hours.I think,only single count without hour,OS,browsers enough.
*administrator should do active removed files.Sometimes users or admin can remove files by mistake or removed files may be found in server hdd.
*Recaptcha in contact form and free users downloads(optional in settings)
*Remote upload needed.
*I can not see language selection bar.(other languages was added.)