I've created an account, logged in on both machines. Tried to follow the support page instructions but they don't match the actual menus on my app. For instance, the first step is "From the File menu, choose Backup. Then click Backup Now to back up your vault." There is no Backup item under the File menu. I selected File:Import... and got a dialog that includes the link "Setting up sync". This takes me to a page with the link "move your existing 1Password data". This takes me back to the page I started from. None of the menu items exist in my version of 1Password.
1Password Version: 6.3.5
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided