Single Adapter Mode (Windows)
Viscosity for Windows 1.4.9 introduced Single Adapter Mode. This can be enabled from Preferences -> Advanced.
Ticking "Use single network adapter for all connections" will cause all connections from that point on to share a single Viscosity Virtual Adapter when connecting. Any connections that have already created their own adapter will continue to use their own adapter and manage it separately.
The advantages of this is that connections will no longer have to create an adapter before they connect, and only a single Viscosity Virtual Adapter needs to exist for all of your connections.
The disadvantages are only one connection can be active at a time (unless the second connection has and manages it's own adapter). It will also mean that you cannot modify the adapter manually as it's settings will be cleared each time you connect in anticipation of a new connection with different settings.
If you wish for a new connection to use it's own adapter, simply untick "Use single network adapter for all connections" and import the new connection, or for an existing connection, untick "Use single network adapter for all connections", edit the existing connection, go to the Advanced tab and remove the 'dev-node' command. Save the connection and then connect, a new adapter will be created just for this connection. Once the adapter is created, you can tick "Use single network adapter for all connections" once more.