Phew! I figured this out. I was having the same issue, and was relentless in figuring this out.
Step 1: Go to your PreSonus Account --> Click on My Products
Step 2: Under the "Software" tab, click on "Download Installer"
Step 3: This will prompt a re-download of the Studio One Software. (The good thing is, the installer is pretty intelligent so it will just install the new things, and leave what is still needed on your computer). *MAKE SURE YOUR CURRENT VERSION OF STUDIO ONE IS CLOSED*
After a few minutes of installing, find the Studio One application in your program folder, run it, and BOOM new updated version! Hope this helps.