using a licence for another (lower) 2015 product?


Is it possible to use a licence for an "internet security 2015" product to activate an "antivirus plus 2015" product?


I am asking because on my windows 7 I have used since years the "antivirus plus 2013" and it worked fine, but now I tried to buy the next generation (2015) with the "internet security" suite, but it produces a lot of errors, so I would like to go back to the more simple "antivirus plus", instead of the "internet security".


Thanks in advance!