Samsung III issue: Unfortunately, Norton Mobile Security has stopped

I have a Samsung III Android Ver. 4.1.2 that I have recently started in getting the following: "Unfortunately, Norton Mobile Security has stopped".  I have had Norton Mobile Security on my phone for over two years and has worked fine.

I have searched the forum posts and have tried suggestions posted: "Clearing the cache and data, uninstalling, restarting and reinstalling several times.  It shows that NMS has been successfully installed and an icon has been placed on the phone.  I try to launch NMS and get the "unfortunately" message.  If I open another app I get the same message.

This problem has started in the last few weeks.  Thanks for any help that can be provided.