IncrediMail e mail App locked out of Norton Security

I Have been a long time user of both IncrediMail (e mail App) and Norton and in the last two days attempted  to upgrade from Norton 360 to the Current  Norton Security but after completion of Norton Security install  was unable to use  IncrediMail  at all , leaving me no choice  but to remove  Norton Security  completely so that I can use IncrediMail . Q will Norton Security  fix the problem or do I have to look fro a different  Internet security  Company , Thank you ....,Mike