The idea is that you purchase (for 0 money) and then you get a confirmation email that you the purchase has gone through and shortly after that (ideally within 15 minutes) you should get another email (check spam filter) with the download link (to drivethru). You should be able to see the same link in your notifications at drivethru.
Although, these free purchases doesn't always compute, I have noticed, but they are available at drivethru for 0 money, so if it doesn't work, just go to drivethru directly and "buy" it.
Thanks, Fenhorn. I never got the second e-mail, but I'll check the DriveThru notifications or just straight-up re-"purchase" it there
UPDATE: There weren't any notifications or archived pdf over at DriveThru, but I had no trouble re-purchasing the file there. Thanks, mate
