When you launch Fusion 360 and go to the Help- About - what version do you see?
If you are in 2.0.7805 then what you will need to do is to go to Preferences - Feature preview - General - Edit in place - Opt in.
If you are not on 2.0.7805 then when you start Fusion 360 , your job status should show you an auto download. Once the download is complete , restart Fusion again to be on the latest build. (2.0.7805).
If you are not able to see the download, then getting your log files to see why you are not getting the download would be necessary. help - Support and diagnostics - get diagnostic log files - post the generated zip files.
