With Confluence version 4.3.7 the slideshow plugin version is 0.3. There is no option to "upgrade" in the Convluence "Manage Add-ons" screen.
But things do not work. The slides show up with a bunch of HTML markup. Clicking the "Show" button gives an error page with a stack trace. The most telling part of the stack trace seems to be:
Not as expected.
Hi all! My name is Miles and I work on the Marketplace team. We’re looking for better ways to recommend and suggest apps that are truly crowd favorites, so of course we wanted to poll the Community. ...
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