Update every hour
I did an upgrade to the paid version to get the hourly forecast update. However it doesn’t seam to have any change anything.
Is there anything that I need to set on the app?
You don't need to do any change to the app, if anything, log out and in again. You should see the 1 hour toggle disabled, by default, and you should be able to enable it by clicking on it (desktop / browser) or tapping. It appears on the bottom of the screen when you select a place in the map or one of your favourites.