Hi @derrick.kwok,
I understand, that the BIM 360 icon is missing in the File Open dialogue in your Revit product after you´ve updated your product from Revit 2017 to 2017.2.
Please, try the following:
- Go to your Windows > Control Panel > Programs > Uninstall a Program
- Select and right-click on "Autodesk A 360 Collaboration for Revit 2017" and click on "Uninstall/ Change"
- Select Repair or Reinstall
- Select Repair and click next
- Retest the behavior
Please, also note, that Revit 2017.2.3 is already available for subscription customers.
Please, feel free to download and install the Revit 2017.2.3 update (from your Autodesk Desktop App or your Autodesk Account) with both your Windows User Account Control (UAC) and your Antivirus software temporarily deactivated.
If the update doesn´t work, you may want to try to completely uninstall the installed version of "Autodesk A 360 Collaboration for Revit 2017" from your computer, and apply the update again.
This should take care of the issue.
Please, mark this as an accepted solution if it did, or let us know, if it didn´t - I´d be happy to continue assisting you.
Best regards,