Uniti Firmware version query.

Hi Forum I have been in contact with Naim about my issues with  my Atom and they said my firmware is out of date. However I cant get the app or unit via remote to recognise any updates available.  I want to confirm if anybody else is on the same as me or on the claimed new one to see if its just my unit not updating. I am currently on 2.3.8574 support say the there is a new one numbered 2.3.8591. 

Any help appreciated.