Once installed, navigate to System > Configuration > Catalog > Magebox, pull down the Magebox Settings, and enable or disable by Scope as required and click Save Config when done.
How to Sync your Dropbox Account with Magento
Once enabled, you will now need to sync your Dropbox account(s). You can do this by navigating to Catalog > Magebox > Manage Accounts, and clicking on Link Dropbox Account in upper right corner. This will then bring you to the Dropbox Sign in Page. Once you are signed in you will then see the below prompt, select Allow.