I have created two custom webparts which I deploy as a Feature within a Solution. These webparts have been added to various pages on my site. Due to design changes, I upgraded the webparts with some new functionality and some
other changes to the webpart properties, such as the WebPart title, title icon and catalog icon. After I have retracted/deleted the old solution and re-deployed the new solution (and activated the feature) the webparts have been upgraded fine, however,
the webpart properties were not changed for any webparts that were already added to pages. I can add new instances of the webparts and they have the updated properties (and also show correctly in the wp gallery and catalog).
Is there a step I am missing in order to upgrade any webparts (namely the properties) that have already been added to pages? Or is this something I have to take care of programmatically somehow to workaround the upgrade problem?
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