Login to your studio and proceed to the Apps section, find there the Reminders module and check its version. If it is not 1.1.0 then this means that it has not been updated (uninstallation and installing an app back right away is not updating it, because files aren't being deleted instantly)
It was also necessary to hit the "Delete" button in the Apps section and wait for a few minutes. I've done this for you. You can now install the updated version.
