Turn off syncing in the organizer preferences. Photoshop.com is going away shortly so you should also make sure you opt out of the move to Revel:
Your current Adobe® Photoshop® Elements or Adobe Premiere® Elements storage and sharing membership on Photoshop.com will move to a new service called Adobe Revel™.
Your photos mean a lot to you. And making sure they're backed up and easy to access means a lot to us.
That's why starting April 2, 2013, we'll automatically move your photos to their new home – Adobe Revel.
You don't have to do a thing.
By doing nothing, you are saying it's okay for us to move your JPEG photos and your Elements membership/Photoshop.com account to Revel. We'll handle your photos with care and keep you updated along the way.
If your library contains file formats other than JPEG photos, please be sure to download your complete Photoshop.com library before June 18, 2013, as Revel doesn't yet support the following file types – any video, PSD, RAW, ACR, PNG, TIFF. Archive now.
The move will start after April 2, but if you want to start using Revel sooner, you can start your move now.
Rather not have us move your photos? Simply opt out by April 2, 2013 and download your complete library before we close on June 18, 2013. Archive now.