first of all thanks for the great plugin!
I'm having a problem since I just switched hosting, I get this warning that freezes my whole site: Warning: Cannot modify header information - headers already sent by (output started at wp-content/plugins/wp-spreadplugin/spreadplugin.php on line 11)
I've solved the problem by just deleting this line: set_time_limit()
Do you have alternative suggestions? Is that code essential somehow? (I wouldn't know, I have no coding skills whatsoever...).