Hi @minho310 ,
Sorry for late response.
FlexNet Connect's trajectory is towards end of life (completely by 2023) - https://helpnet.flexerasoftware.com/eol/flexnet-connect.htm
The replacement product can be found here - https://www.flexerasoftware.com/monetize/business-solutions/iot-updates-and-insights.html
I'm not aware of direct sales coverage in South Korea, so have reached out to a potential partner on your behalf.