Q: my download of maverick was interupted during the download and now it will not allow mw to continue or finish the download

When I was downloading Maverick from the Apple Store the process was interupted and I could not get it to resume later. I have shut down my computer several time but this did not help. I need Maverick to use a knew program I bought recently. My computer is a MacBook Pro 13.3 inch screen running Mac OS X (10.7.5), processor 2.9 Ghz Intel Core i7 with 8 GB  Ram. How can I down load Maverick NOW?