WinZip 17.5 Suspicious.Cloud.7.F false positive?

I've just installed the latest version of Winzip (17.5) which was an update from ver 17.0 but Norton blocked Suspicious.Cloud.7.F which was in a .dll file (ssleay32.dll), previous installation had no problems & I'd like to know whether this is a false positive or not & whether others have had the same or similar experience with this program. I've uninstalled ver 17.5 & returned to ver 17.0 as a precaution but can easily reinstall.

I have also contacted Norton to report it to see whether it is a false positive or not.

Thanks in advance,