The auto updating scripts does not work with the latest beta when having NGUI 3.7.5 in the project and the scripts for that should be auto upgraded. I filed a bug report on that one.
That said: so since the auto updating script failed initially, i then restarted the editor and started manually fixing the issues and then after fixing a good amount of them that way, i then closed the editor again, opened it again and chose to try it again with the auto updater and then it worked.
So then i got it all updated =)
So the auto updater was seemingly getting stuck somewhere and manually fixing that one issue then made it be possible to run through for the rest.
As bottomline though, yes, after auto updating, still flipped letters in ngui labels :I =)