Open Preferences and check the 'Automatic Updates' section in the Advanced tab, Uvah.
Provided the Update Manager has not been turned off and it's NOT set to prompt you before checking for updates (in which case it will only ask you about once a week), an automatic check for updates is silently performed in the background once every 24 hours - and you're only prompted if a new version is found.
If users stick to installation defaults regarding the Update Manager, everybody will be notified of a new version within a period of 24 hours.
This said, you can also force a manual Check for Updates in the Advanced tab of Preferences. 
