try deleting the RID key in the registry (regedit) HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\famatech\RadminVPN\1.0 HKEY_LOCAL_MACHINE\SOFTWARE\famatech\RadminVPN\1.0 for windows x32 And restart the service Control panel - Administrative tools - Services - Radmin VPN Control Service - resart
Could you send a screenshot of Radmin VPN?
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\famatech\RadminVPN\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\famatech\RadminVPN\1.0 for windows x32
And restart the service
Control panel - Administrative tools - Services - Radmin VPN Control Service - resart
Could you please submit a ticket? http://www.radmin-vpn.com/support/
We`ll do our best to help you to fix this problem.