1. Download it here: http://www.minecraftforum.net/news/230-19-is-out/

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For Windows Vista Users:

1. Open start menu.

2. Type in "Run" in the box and click it.

3. Type in "%appdata%".

4. Open ".minecraft".

5. go to "Bin"

6. Use WinRAR to open minecraft.jar.

7. Drag and drop the file into minecraft.jar.

8. Exit and then run Minecraft! Enjoy!

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For Windows 7 Users:

1. Click the little folder at the bottom.

2. Type "%appdata%" at the top.

3. Click ".minecraft"

4. Click "Bin", then open "Minecraft.jar" with WinRAR.

5. Drag the folders in the file.

6. Exit then play Minecraft! Enjoy!