Windows Live Mail Update

We received the email from Microsoft telling us to run the update in order to keep using Windows Live Mail (2012). The update killed our email. We have two Dell laptops. One with W10 and one with W7. We have 4 email accounts added to the Windows Live Email program. 3 are @Live accounts and 1 is an @Hotmail account. The update killed our ability to update and to receive our email in the various accounts. They just stopped updating and receiving. Sending is questionable. It appears the updates and aps it asked us to use also screwed up the email accounts on our iPhones. They too do not seem to be receiving or updating. Not sure one has to do with the other, but it is a coincidence, as the timing and issue occurred after running the requested update on both of our laptops (W10 and W7). There is no doubt, the update MS insisted we install, killed our Windows Live Mail accounts on the two laptops. Did MS not TEST this first? And what do we all do now that our mail programs are screwed up? Is MS unaware of what they did? Any plans for a solution?