What has changed in the last 7 years

I first became interested in MMS in 2011 and purchased Jim's book at that time I also purchased the MMS product but did not use it seriously apart from orally. Some health issues recently means I now want to take another look at it and have a couple of questions

1.What has changed from the info in the 2011 book edition and do these changes mean I need to purchase the latest version And what have been the main advances made since 2011 Has it gained more acceptance

2 Is my old MMS product still reliable and safe to use It is around 7 years old and has been kept in the fridge The NaClO2 is in glass but the activator is in plastic (with a BB date of 2015)

Many thanks