Since June, when Google Adwords began moving their reports into the Campaigns tab, every key report has now been moved over. Generally, this allows you to quickly download your data from the same pages you manage your account.
Google have announced on their Adwords Blog that the final transition is in sight and that they will be retiring the Report Centre in the next few weeks. The scheduling and downloading of reports will then take place within the Campaigns tab.
Each of your scheduled reports have now been transferred over to the Control Panel & Library. Come early November, the sending of old scheduled reports from the Reports tab will be stopped. Following that will be the deletion of the Report Centre.