I read the warning that this plugin was not tested on 2.7, but it is the only way I can see to access the external_links.js file in the themes/(custom folder name) folder.
I launched it once, browsed to find the file, but the edit wouldn't save (thought it was an image file). So I copied the code, edited it with the intention to upload it. Went back to the FTP plugin, but now the default path appears to be the path of someone who might have been doing development work for the this web.
instead of - wow I didn't copy and paste the correct path - I didn't write it down. I didn't think I needed to.
I have buggered up this website bit time. I really need some assistance. I have been unable to access this source file any other way, web owner doesn't have information on where this web is hosted and I tried to FileZilla into the web folders, but my WP login isn't working for FTP account access.