Do you have any idea where I should go to upgrade? Do I go online in Adobe or do I do it within Lightroom 4.
Please click on the below link to upgrade to latest version of Lightroom
Please make the selection properly as
This will allow you to purchase Lightroom 6 for your computer.
Hope this helps.
You can only upgrade to Lr6 through Adobe. You may be able to get a Lr5 upgrade through a Retailer such as Amazon but there is not sense in getting Lr5 if Lr6 works on your hardware and operating system.