AMHERST — A downtown store featuring nostalgia candy will be moving to Thornes Marketplace in Northampton in June. Captain Candy, which opened at the 103 North Pleasant St. Shops three-and-a-half years ago, will close its Amherst location May 5. Nolan Anaya, who owns both Captain Candy and the North Amherst based Captain Video, said it is an exciting and sad move for the store, which has 175 bins of bulk candy and focuses on treats such as gummy bears, gum drops, licorices, smarties and chocolates. “Thornes Market is a great institution in Northampton,” said Anaya.