The Creative Cloud desktop app (the central installer for all Creative Cloud apps) should be showing you all updates as they become available, in the Updates screen.
If you aren’t seeing the latest, click Updates on the left, then on the right, click the options menu on the right with the ellipses (…), and choose Check for Updates.
If your Creative Cloud app doesn’t look like the picture above, it’s out of date. Download the latest one using the instructions on this page:
Download the Creative Cloud desktop app