A very random issue by where the server would send out a blank email instead of an email containing the links to the items you purchased for download has been found and resolved.
I have since contacted all those who have paid for an item to verify that they have all received the item they purchased.
Those who have tried to download free items may have also experienced this problem too. If you were effected, please proceed to download the free item again.
The issue has been resolved. Sorry for any inconvenience this has caused.