To export from Endnote in the commonly supported .RIS format select File and then Export in Endnote.
Choose Refman .RIS Format, if you do not have this available click 'Select another style' and add from the list.
This will export as a .TXT file in the RIS format and can be imported into your software. Some software may require this saving with a .RIS filetype (Example: exportedreferences.ris)