Step 1
Click on the Webador logo in the top left corner of the Editor.
Step 2
On the My sites page, click on My subscription (if you no longer have an active subscription, click on Invoices).
Step 3
On the subscription page, in the menu on the left, click on Invoices. Click on the blue text (e.g. 2020-12345) next to an invoice to download it.