Deep Zoom Composer received an update, over the weekend. This release fixes non-opening .dzprj files, and improved project support the memory handling has also been improved, the Seadragon Ajax Templates have been updated again and various other tweaks were done. Besides this check out the updated documentation! It has become a true User Guide with topics ranging from what Deep Zoom is to how to actually use Deep Zoom Composer. You can access the User Guide inside Deep Zoom Composer by going to Help > User Guide or by pressing F1.