Although JCE Pro 2.7 has been available for download for a few weeks now, significant changes in the API necessitated a "soft release" - limited availability only via the Downloads section of this site, and not via the the Updates channel - in order to limit user exposure to undiscovered major issues.
We are now confident that all major issues have been resolved, and JCE Pro 2.7.7 is now available for Download and via Joomla Updates.
JCE MediaBox has been rebuilt as a modern, responsive lightbox extension for Joomla 3 and Joomla 4. Our goal for this version is to create an attractive and easy to use, responsive and accessible lightbox as a companion for the JCE Editor, or for use as a standalone Joomla extension.
MediaBox 2 is compatible with existing MediaBox code, and comes with updated versions of the 4 themes - Standard, Light, Shadow and Squeeze. A future version will include Bootstrap and UIKit styles.