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Please read the readme file in the CBB package, it provides instructions on this!
Oh ok I will relent :) I did this last week. Basically it says you can upgrade directly - just upload the new files and press the update module button in module admin. However, there is also an extra folder called Framework that you may need to place in your root directory, depending on what version of XOOPS you are using.
Make sure you back up your database before attempting to upgrade.