Any questions, email [email protected].
In your Confluence/JIRA Manage Add-ons screen (/plugins/servlet/upm or via Add-ons option from the settings cog) select the draw.io plugin:
And press the Free trial button. You'll be prompted to log into your Atlassian account. Once you do, a trial license will be created and inserted for you.
Once your evaluation periods have expired (you can request up to 3 x 30 day evaluations, or 6 via an Atlassian Expert), as a commercial Confluence/JIRA licensee, you will need to license the draw.io plugin to continue using it.
The draw.io plugin section in the Add-ons page also has a "Buy now" button. Pressing this takes you to the Atlassian store and selects the license size appropriate to your Confluence/JIRA instance. When the purchase is complete, your license will be automatically installed into the Confluence/JIRA instance.
Community licensees can request free licenses in the normal way.