Sometimes web apps like Grow get stuck with stale data. Just clicking refresh or hitting Cmd-R won't work because the browser doesn't realize the data is old, so it won't pull in new data.
You can force Chrome to pull in new data and ignore the saved data by using the keyboard shortcut Cmd+Shift+R on a Mac, and Ctrl+F5 on a PC.
If that doesn't work, you can actually delete the saved files and info. To clear your cache and cookies on Chrome you can open the Chrome Menu > Clear Browsing Data.
And select Cookies, and Cached.
This will clear your cookies and your cached images and files, and will get rid of the stale data. This is often a fix for little issues that pop up while using web apps.
Note: Removing the cookie will mean you have to login to the sites you use again, so make sure you know your passwords before you do this.