Most "keygens" are delivery vehicles for trojans, ransomware, or keyloggers. Since a VPN client handles your most sensitive data, using a compromised version defeats the purpose of having a VPN.
You can write scripts to run automatically when a VPN connects or disconnects. viscosity vpn license key
If you're having trouble obtaining or activating your Viscosity VPN license key, I recommend contacting the software vendor or a licensed reseller for assistance. viscosity vpn license key