After purchase via Humble Widget on the site you should get an email with a link from Humble. If you don't get it
Make sure the purchase was successful
Check your spam folder
If you are using Gmail, check the Promotions tab
Wait a few minutes
Email support [at] pyxeledit.com
The application can be downloaded from your license page on pyxeledit.com or from your Humble download page linked in the purchase email.
If you have lost access to your Humble page you can use the Humble resender.
If you have lost access to your license page on pyxeledit.com you can use the Resend license page. See Finding Your License for detailed instructions.
The Humble download page looks like below. Here you can access the link to your license page and the application download.
Humble download page
License page