Molinari, whose last victory came at the Johnnie Walker Championship at Gleneagles in 2010, said: "It's fantastic. I've been through some very hard times with injuries and bad form.
"To be able to win this week deletes a lot of bad memories and hopefully I can keep going down this road."
When asked whether it was one of his best ever performances on a back nine, he said: "Given the circumstances it's probably one of the best.
"I've probably been the player who has spent the most time on the driving range over the last three years. This is a great reward for so much hard work."