I am glad that recently Mcafee has white listed official NSIS installer. However many programs that use NSIS installer are still detected as "BehavesLike.Win32.Dropper.nh". I have already submitted the file for check up.
I have too submitted our software to be inspected to Mcafee possible false. Now waiting for a feedback from them. Hopefully they will white list it and normal programs that use nsis
Please follow the instructions in the KB listed below.