Whats the difference between Dropbox and Dropbox Main Folder?

When you are about the create a Wok linking to Dropbox there are two options: Dropbox and Dropbox Main Folder

 

Both for sure link to your Dropbox. By default all Apps that are linked to your Dropbox work in the "Apps" folder. So creating a normal Dropbox Wok will create the related folder in the "Apps" folder of your Dropbox.

A Dropbox Main Folder Wok allows you to create a folder on the main (root) level of your Dropbox. To do this requires you to provide more authorizations than for the App folder case. For sure we can and would never access any other folder of your Dropbox so it's up to you which option you prefer.