"Resources" is for various additional tool for language learning.
About "Export Dictionary"
The "Export Dictionary" page is for exporting dictionary entries.
If the "Export All" option is checked, this page will export all the entries in the dictionary for the selected input languages. If the "Export All" option is unchecked, this page will export only the entries which are displayed for the selected input languages. These were those looked up in the previous search or edit dictionary page visit.
The input languages determine the entries looked up and the output keys. The output languages determine what language definition sense information is included in the export.
The "Select format" field is for selecting the export format. Turn on the field help to see individual format descriptions. Each format may also have additional options that will be displayed. Some formats (such as the line and block pattern formats) support both file export and text export displayed on the output page.