The 19-year-old, who won Olympic gold in the 57kg category at London 2012 last summer, lost first time out at the Trelleborg Open in Sweden last month.
However she bounced back in style in Hamburg defeating Russian Daria Zhuravleva 13-11 in the -57kg final while she had earlier come from 4-1 down to beat Vinciane Douet 7-6.
And, with the World Championships scheduled for Mexico in July, Jones, who won silver two years ago in South Korea, is desperate to go one step further this time around.
“After the disappointment of losing in Sweden I was determined to do well here,” said Jones. “So I was really happy with my performances.
“Now, it’s all about my preparations for the World Championships. I only got silver last time and I’d love to win gold.”