I purchased Microsoft Office Pro 2013 from Dell along with my new laptop.  The laptop had an icon on the desktop for me to click on and download Microsoft Office Pro 2013.  I decided to download the 32 bit version of Office.

Unfortunately I am running into a problem that I do not have enough memory to load all my Excel spreadsheets to process with my macros. On my old laptop running Windows 7 and Excel 2010 I had plenty of memory available to load the spreadsheets all at once to process but now I can't.  I have 16GBs of memory on my new computer as opposed to 8GBs on my old computer so I am being restricted from loading the spreadsheets because of the 32 bit version of Excel I am using now.

Is there some way I can download the 64 bit version of Office 2013 to install and uninstall the 32 bit version and activate the 64 bit version with the license key I have to use Office 2013?