After that when I try to turn on Excel I see statement there was a problem with helper add in, and ask me if I want turn off this add in. This statement is only in first run Excel after previous error. The worst is that my secure save file gone - probably antivirus deleted him.
Do you have a code signing certificate?
If not, you can also report the false positive to Norton and ask them to fix the issue with your EXE file.
Note that Norton did not trigger any problem on virustotal.com