I am unable to get these to synch anylonger. On my PC, it looks like the C:\Users\username\Dropbox\1Password.agilekeychain is no longer updating - the date of this directory is 7/29/13.
Would love some help here.
The date of the directory does not change after 1Password creates that data folder, it's the content of that folder that will change over time.
First, can you tell me if you get any errors when you open 1Password on the iPhone, go to Settings > Sync, and tap on Sync Now? Sometime when you switch to a new phone, it takes a while for everything to show up because a lot of things are happening at the same time and you have to wait for things to settle down.
If you don't get any errors, check again if you're seeing any changes you made on the PC. If you still cannot see any changes, can you open 1PasswordAnywhere on Dropbox.com to see if the changes showed up there. Here's how: https://guides.agilebits.com/1password-windows-kb/4/en/topic/using-1passwordanywhere