Thanks for the reply!
I went to the Applications section of my Admin CP, found News had a tag on it saying "Update Available." I clicked on that and went to a page on DevFuse, about news, with no option to update or download anything.
Next at the top of my Admin CP, I clicked the link to "add new applications from the marketplace" and searched for and found News. The only button available said "Install," so I clicked on that. I got this message:
So whatever I do, I can't upgrade News version 2.3.0 with version 2.3.1 without over-writing everything and deleting the news stories I have so far.
Could this be a problem on my end somehow? As anybody else been able to update to version 2.3.1 without having this issue?