After the download, has it been installed? "All is up-to-date" means mostly that you downloaded the latest version, nothing else.
Which program? How did you download it? Mac or PC?
I downloaded it to a mac. But all I have access to is to creative cloud. I can't even open a new file to create a document.
When happens when you launch the InDesign application? (What exactly do you see?) What happens when you choose File > New > Document?