Yep -V7 was a nightmare for me, it was my personal "X1".
There's a bit of a learning curve involved transitioning from the 'old' to the 'new'. My advice is don't fight the program by insisting on trying to do things the 'old' way, try the new way.You'll probably have a few WTF moments but stick with it for a while and then you'll probably have a "Eureka" moment when it all makes sense.
Then you'll discover screensets........At that point you'll start to wonder how on earth you've stuck with and managed with the 'old' Sonar for so long.
That's how it was for me anyway. Remember there's plenty of help with the transition available here.