I've migrated all your user accounts and purchases and activated the new system. If you hover your mouse over 'Store' there at the top, you'll see "Your Account" in the dropdown; you'll be able to log in there once you've reset your password.
Unfortunately, you can't reset your password from that page - you have to do that from the Wordpress login page, reachable on the right by clicking "Log in" under "Meta".
On the "Your Account" page, you'll be able to see the amount and date of your purchase, as well as see a download link for your software. Note that you are now limited to one hundred total downloads of the software, but that is not intended as permission to distribute anything to anyone; the limit is high only for your convenience.
As always, feel free to e-mail email@example.com if you need assistance.