Go to the My Buds section of your HP Hearing App. The Update Center will indicate if the Firmware is up to date (as below) or needs updating.
If both the App and hearing aid Firmware are up to date, both lines will show in green with a tick. If an update is needed, the line will be white and state Update Now. If the text reads 'Update Now' select this to update your hearing aids.
This video will show you how to locate the update center in your HP Hearing PRO App.