From DJI forums:
"Strange....The new version is available on the playstore 4.3.12...... 1/24/19
I downloaded on my S7 to test......
But I have to wait for the update to my CS!!! "
On checking with DJI GO 4 app in BT 300 Moverio Glasses it still says Version 4.3.1 . Should I remove this completely and start again I wonder? On firing up today (UK) I got the notice incompatible firmware. I thought after this downloaded all would be well but not so. maybe on to play store and download again is the answer.