If you have Aurora HDR 2019 installed on your system, Luminar Flex is automatically installed as a plugin. This allows you to run Luminar Flex as an add-on module when editing in Aurora HDR.
Make sure Aurora HDR 2019 is open.
Open an image you’d like to develop or merge a bracketed series together.
Apply any desired edits with the Aurora HDR controls.
Choose Plugins > Other > Open Plugin... and locate the Luminar Flex application
Luminar Flex should automatically open the image you were editing. If needed, click the Luminar Flex icon in your Dock or taskbar to switch to Luminar Flex.
Make any edits or adjustments as needed in Luminar Flex. Use Luminar Looks or Workspaces to speed up your editing workflow.
When done, click the Apply button to send the adjusted image back to Aurora HDR as a layer.