It's quite impossible to provide time frames for software updates. It's very possible that they won't be able to break the most recent Amazon encryption. Only time and the efforts of Epubor's programmers will tell.
Thank you for using our software. We are working on a solution for this issue. Once there is any progress, we will let you know. If you have a kindle eink device, please download your kindle books via it and then remove drm with Epubor Ultimate.