How to update the Freeplay from Compute module 3 to Compute module 3+

[faresdelvalle]

hope all is well, I just put together my new Freeplay tech board with compute module 3+ and the new add-on to the Boxy pixel dual analog sticks. I followed all instructions the doc attached below https://docs.google.com/document/d/13ztk8Kr4_ORlY7lxX8KTQxo5e22cAsnQaAz2oZtT_ok/edit?usp=sharing I’m currently using the same flash image from my previous Freeplay built. Just to make sure everything is working. However whenever I try to Hold the power switch on for roughly 10sec the Freeplaytech green light won’t start. I removed the Raspberry pi compute module several times from it slot thinking it was that. But every time I place it back into the slot and I hear a soft click which tells me it’s in place. 
I removed my old compute module 3 and placed into my new board and it’s working. The new compute module 3+ seems to be the problem. 
I flashed Freeplaytech latest .img and it working. How do I update my older .img so it can work with the new Compute module 3+?
Does the Compute module 3+ require different software from the regular Compute module 3?