In your PokerStars client, select Settings->Playing History->Hand History. Make sure “Save My Hands History” is checked and note the “Where To Save” folder path. It is probably something like

C:\Users\LoginName\AppData\Local\PokerStars\HandHistory

where LoginName is your Windows login user name. PokerStars will create another folder here with the same name as your Pokerstars user name. So hand histories will actually be stored here (or something similar):

C:\Users\LoginName\AppData\Local\PokerStars\HandHistory\UserName

Where UserName is your PokerStars user name. Note that turning this option on does not save any previously played tournament hand histories. It will only save new tournaments you play.

Important: Make sure the “Save in English” checkbox is turned on.

After you have played a tournament so that a hand history has been saved, open the SitNGo Wizard. Click on “Open a tournament folder” on the Wizard’s home page and select the folder above. The Wizard will load the hand history files contained in this folder.

Note: If there are no hand histories in your PokerStars hand history folder and you are using Holdem Manager 2 it is because HM2 has moved your hand history files to its archive folder. By default, the HM2 archive folder is located at C:\HM2Archive.