This morning I performed the upgrade and everything went smoothly except the Goldcoin icon disappeared from my home screen. This was an easy fix as I simply clicked on the "Apps" button to locate the application and move it back to my home screen.
My previous balance is correctly reflected and the list of previous transactions is present. When opening the updated app, the user is shown a reminder to backup the wallet. Once the backup has been completed, this message disappears.

I was thinking the new app had a pincode feature when sending? However, I cannot find a setting to activate this feature.
That's all for now. I'll continue testing the App and will report any additional findings in this thread.