Question about how to compile and decompile DTB files for Coreelec?

Basically I am looking for a fix to a problem regarding the DTB… I have been using standard T95 S2 boxes from Amazon for a long time (https://www.amazon.co.uk/Android-Amlogic-Quad-Core-supports-2-4GHz/dp/B071W8P17Q) - they seemed to have recently changed something with the box though as the DTB.img that has always worked for CE with these boxes, no longer does.I thought that a new DTB file for this new version of the box will be needed to be created - but am new to device trees and unsure where to start.