Go to the game folder/profiles/editor_a2.cfg, open it with Notepad. Change the line setvar map_editor_mode = 0 to setvar map_editor_mode = 1. Open the editor and press View->GameDatabase->New Window. A new window will appear. Right-click on the border, select Tables, choose the desired resources from the list using checkboxes, and press OK. Go to the desired resource in the dropdown list.