[ernhrts3n8]

I have a question. I was emailed this type of a file because it is no longer offered on the app store. I had purschased this program a couple of years ago and I had to wipe my phone. When I do a restore it doesn't bring this program back onto the phone. The company sent me this file in an email....how do I get it to be recognized on my phone and be able to use the program. Thanks in adavance! I am kind of computer illerate when it comes to programs and such, so I apolgize in advance.