Looks like something has changed in V9 recently that did affect my Configuration Data Manager solution, too, so there is an updated version you can download now which works with V9.
It also fixes a couple of issues related to big integer numbers and to the missing N:N relationships. Yet keeping in mind that it works in the most recent V9, it’s just a better version overall
However, just to show you how easy it is to use this solution (and you don’t even need to install any tools on your machine), here is a quick recording me bringing over a few accounts and a few related contacts from one environment to another using this tool:
Just keep in mind this tool is not meant for large data transfers. It’s best suited for moving “configuration data” between different environments as part of your other solutions.