Using City Navigator map on Basecamp without connecting Garmin 660LM

Former Member
Former Member
I have a new Garmin 660LM and Basecamp V4.62 running on Win10.

Question: Is there a way to use City Navigator North America V2017.3 on Basecamp without connecting the 660LM?

Looking at Menu Maps - Manage Products- I see both Global and City maps listed when the 660LM is connected. When highlighting the City Nav map it won't let me "Unlock on line"

Thanks for the help!
Jeff