NIS 22.5.2.15 on Windows 10 64bit Pro

I have just upgraded from Windows 7 64bit pro to Windows 10 64 bit pro.      My Norton Internet Security version is 22.5.2.15 and "appears" to be working OK.   When I look at the Task Manager it says I am running Norton Internet Security (32 bit).     I have two folders  Engine and  Engine64 under C:\Program Files (x86)\Norton Internet Security   Both have sub folders  22.5.2.15 

It has been so long I have forgotten,  but there is something at the back of my mind in Windows 7 about running 32bit because something wouldn't run in 64bit   (Identity safe??)    I do use Identity safe a lot. 

What is the point of having 64 bit NIS if my PC is not running it.    Should it be running it and, if so, how?  Is it reliable under Windows 10?