btw, if someone is interested a user posted the solution on the gmail forum shorty82 : "Click "Join Google+" and then click "Cancel" on the G+ signup screen. T

btw, if someone is interested a user posted the solution on the gmail forum shorty82 : "Click "Join Google+" and then click "Cancel" on the G+ signup screen. That gets Hangouts to come up properly so you can revert to the old chat by clicking next to your name and choosing "Revert to old chat""