Unfortunately, No.
As a general rule, you should aim to complete your photo book project within a couple of months. We do not advise working on a single project for years, as technology and platforms and costs are continually changing (often beyond our control). If you have a truly long-term project, we strongly recommend breaking it down into separate volumes that can be printed as completed.
Our Cahoots Easy Editor for Windows and Cahoots Pizazz for macOS and Easy Designer for Windows and macOS were all licensed from third parties and once the agreements are terminated, we are no longer able to process files from those applications. By extension, this means that all your .epb and .dtp/.dtpx files will no longer be of any practical use. However, in some cases you may possibly be able to cut and paste between old and new applications to most easily recreate your book with updated tools.
Since January 2017, we no longer have the licensing or infrastructure in place to process submitted book files originating from Easy Editor, and from January 2024, we will no longer have the licensing or infrastructure to process book files from Easy Designer. Given the disruption caused by such changes, Cahoots is now moving to a generic photo book design software platform. In so doing we are turning our backs on the traditional photo book business model. With a personal license for YouDesign Photo Book software (or any of our other recommended tools), you will be able to generate full resolution print-ready files that can be taken to any print house with book production facilities. By using YouDesign Photo Book You will no longer be tied to Cahoots as your book production partner. (But naturally we stand ready to produce your project should you select us to do so.)
If you require exact reprints of any book previously printed by us, please get in touch as we may be able to provide you with a reprint from a backup of the associated print file. We can also provide an archive copy of this same print file (which could be professionally printed at any time in the future). A nominal fee applies for this service.