How long does it take to upload a new version?

The certification usually completes within few hours, but sometimes it may take longer up to three business days. By default, the submission will be published as soon as it passes certification, unless the developer chooses to place a hold on publishing the submission until a certain date, or until they manually indicate that it should be published. For new apps and updates which include changes to the app's packages, the publishing process will be completed within 24 hours. For updates that only change options such as Store listing details, but don't change the app's packages, the publishing process will take less than one hour. Complete guide on the app certification process along with updating and managing submissions and publishing can be found here https://docs.microsoft.com/en-us/windows/uwp/publish/the-app-certification-process. For additional assistance with product submission, certification, publishing or Partner Center navigation questions or issues, developers can contact Developer Support here: http://aka.ms/storesupport . Hope this helps.