The Setup Wizard will automatically detect the installed version and upgrade applicable components.

Steps for Upgrading:

1. Copy the update executable to server in your SharePoint farm.
2. Log into the SharePoint server as a Farm Administrator (preferably the account used to originally install Mega Drop Down).
3. Run the setup wizard to install Mega Drop Down.
4. The wizard will detect that Mega Drop Down is already installed and prompt to Upgrade or Remove.
5. Select Upgrade and complete the wizard.
6. Clear your browser cache to remove any cached JavaScript files.

It is recommended that you perform an IISRESET on the server(s) before upgrading.