And no, you don´t have to wait. When you put in a new IP of a node in "settings", you go to the "Start delegated harvesting" button immediately . Try to start that, and if no work (Oops, bla bla . .),
Where I can find that node ip "settings"?
Protocol
HTTP
Host localhost
Port default
Use default port.
Settings points to localhost, and I think that is secure. Also no information about node settings option in settings. Also that a big misunderstanding I only today figure out, sadly I need to have wallet open and start remote harvesting every time I login. First I thought that only one click of the button is OK.