How to Change File Associations in Windows 7

1. Open the 'Start' button and click the 'Default Programs' shortcut. Click the 'Set Associations' option.
2. Scroll down the list to find the file extension you want to change. Click it to select it.
3. Click the 'Change program' button. Click the program you want to use to open the file. If the program doesn't appear, click the 'Browse' button to find it. Click 'OK' to set the file association.