Recently active topics in Dipity tagged with import

I had a date wrong in a Picasa folder, and didn't realize it until I entered in my Timeline. I fixed it in Picasa, and even deleted the feed in my timeline. I checked the folder, and it is now showing the right date. When I reentered the feed into my timeline, I found that it had not updated it. How do I get it to re-pull the correct data, or is there a way that I can manually update it?