Verb conjugation of "redevenir" in French

My brother moved there last year. He met a woman and went after her. After six years they have broken up, but he no longer wanted to return, because he has settled down in his new home. I am visiting him once a year.
The system will collect information about the learning behavior and guide the user through a tailor-made process that is best suited for him. This technique is not entirely new but we are redesigning the whole concept of it.
During the summer it can get pretty hot and humid here in Florida (strong winds from the south also happen, hurricanes), but I still think that Florida is an exciting and diverse state also in the summer.