Thanks for the update. Can you verify the Version number listed in the Help drop down menu > About > About Fusion 360 dialogue? The current version should be listed, 1.8.674.
You may also check into things that may interferre with the software update/online connectivity. For example, you may consider temporarily disabling:
-Firewalls
-Anti-virus software
-User Account Control (UAC) Settings (In Control Panel\All Control Panel Items\User Accounts > User Account Control Settings > Lower the slider to the 'Never Notify' position)
It may also be a good idea to clear your internet browser cache and the temp directory.
-In your Internet Browser > Press CTRL + SHIFT + DELETE > OK to clear cache
-In Start Menu search bar type %temp% to open the temp directory > delete the contents of this directory (as much as you can)
After performing these suggestions, restart Fusion 360 and look for alerts to warn you about the update.
I'm not aware of any triggers to "force" update. I will look into that option deeper, though.
Please keep us posted on your progress.
Nathan Chandler
Principal Specialist