You need to be logged into the Mac app store with the same userid you originally used to purchase product then click on updates if you still cannot see any update then try to reboot your Mac as I have sometimes had problems with the app store an found a reboot of laptop rectifies problem
Just an idea, but would it make sense for staff to create a sticky thread, which basically acts as a list of all resources shared by members?
The list could display each contributing member's name, followed by the list of their resources, or alternatively, listed by type of resource (Macros / Brushes) etc.
This would prevent having to scroll down through potentially hundreds of separate threads.
The users could still post their specific threads here, but the top thread could be made sticky - listing them all.
All the users / creators would need to do would be to request that their resource gets added to the list.
If each member who thinks this is a good idea "likes" this post, it will then be easier for staff to see if the community likes this idea or not (without having to post lots of separate +1 posts.)
Just an idea :)