Thank you for taking the time to share the details of your experience and feedback with the Community, although I apologize that you have not yet received a response.
We'll need a bit more information to be able to assist.
Please take a moment to navigate to Help > About Quicken and provide the release that you are currently running.
Is this happening to a specific reminder any reminder you try to add? Is this an income and expense reminder?
The more information you can provide regarding this issue will help the Community to better understand and assist.
Quicken will list the most recently opened data files, with a checkmark next to the file you are currently viewing.
Let us know how it goes!
It looks like you're new here. If you want to get involved, click one of these buttons!