Widget WP-Meteo3D

This widget comes from http://www.meteolive3d.com/wordpress-plugin.asp it is not in the current ww.wp.xz.cn directory of plugins (on search from Genesis /Enterprise theme)but it looks although it may have been historically.

On activating & loading the plugin a warning message something along these lines appears:
(actually this is from intenet search as I uninstalled it)

Warning: Cannot modify header information – headers already sent by (output started at /home/ihreeve/public_html/wp-content/plugins/wp-meteo3d-widget/wp-meteo3d.php:1) in /home/ihreeve/public_html/wp-includes/pluggable.php on line 868

The line no on mine was different about 940 I think.

Studiopress believe “That error means there was a blank line at the end of the plugin file.”

Can I rectify this or should I give up & forget my wwweather addition to the I World section of the site http://I.co.uk ?

All inputs appreciated particularily if anyone has it installed & is getting hourly weather updates!