1) When you are on the kickstarter page, at your lower right should be a greenish box that reads “You’re a backer!”. Below this is a blue button that reads “Manage”. Click on the blue button.
2) This will bring up a new page. At the bottom center of this page is a blue button that reads “Change your pledge”. Click on the blue button.
3) Another new page will appear. At the bottom center of this page is a box with a blue border that is labeled “Pledge amount”. You would type your new pledge total in here. Then click the green “continue” button to the right.
4) A new page will then appear. Click on the blue ‘Confirm’ button, and your pledge should be changed.
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