Warning message when checking for updates

Hello,
I’ve recently started using NetNewsWire for macOS and I really like it. When checking for updates, I get the following warning message:

“org.sparkle-project.Downloader” is different from previously used versions. Are you sure you want to open it?

Opening “org.sparkle-project.Downloader” will allow access to previously used versions of “org.sparkle-project.Downloader”.

What does this mean? Is it a bug?

This has come up now and again over the years. The best I can guess is it’s just some fluky macOS bug. (If it were affecting everybody, and tied to a given release, that would be one thing — but it’s not.)

If you’re nervous about it, you could update manually — download the latest version from netnewswire.com.

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