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I've looked around on the XOOPS Dev Forge, the module listing here, the module documentation and the developer's site and unfortunately, I did not see anything referring to how to upgrade.
What I suggest is
* Backup the module's original files and your database
* Delete the files from your server but do not uninstall the module from your XOOPS admin.
* Upload the new module in the old module's place
* Go into your XOOPS admin and update the module.
If the module can be upgraded, this method *should* work, but make sure you have a backup before you begin.
Hope this helps.
James
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.