If you changed your keywords in the topic, you are right that previously skipped articles will not ‘re-appear’ after your changes.
MyCurator only goes back about 7 days, it is built to focus on keeping up with the new stream of articles each day. We really don’t have a way to ‘reset’ it. But with so much content being created each day, you’ll quickly have enough new content to work with.
You can also go to sites that you know have some content that you ‘missed’ with your changes and use our Get It tool to grab it.
If you changed some formatting options, you still should be able to edit any article from the Training page when you go to make it live. You can update it to what you would like to see in the editor.
I hope this helps, please feel free to respond with more details.