DavidR
86
The 4.5.531 update is only available to those who have the been using the beta builds (and changed the file to be able to receive the beta builds) after the 4.5.523 official release version.
If you still have the official .523 build you won’t be offered the .531 (beta build) as an auto update or using manual update.
It would appear that KCalla is still using the official 4.5.523 build, although his post is in the 4.5 BETA thread.