I have tried uninstalling the 2015 CC version and now on to using 2014 CC. It says cannot open the file that was created using a later version of InDesign. Then i tried saving the file to idml format. It freezes every time i try opening in the InDesign 2014 CC. Any help?
I've branched your question to a new thread and re-titled it.
If your CC 2014 is patched to version 10.1 and you have an internet connection you should be able to open later version files using the web-based on-the-fly converter.