MCPE v0.16 not working 5th gen ipod running ios 9.3.5

Both of my kids have 5th generation ipods running ios 9.3.5, and when minecraft updated to v 0.16 their worlds no longer load, when they click on a world minecraft shuts down. It has been 4 days since it has updated and it is extremely frustrating as this is a paid game and we are getting ripped off!!