Just figured out how to get this plugin working and thought I would share for others.
I am using the latest plugin and wordpress version. Like others, I had been seeing a blank black screen of the plugin working, and in my case no log files. I added this to my functions file:
define('ALTERNATE_WP_CRON', true); define('WP_TEMP_DIR', ABSPATH . 'wp-content/tmp');
But it appears that the plugin was not creating the temp folder. When I manually created the temp folder, viola! The plugin started working.
Hope this helps someone. Maybe a bug, Daniel? Thanks Daniel for sharing a great plugin!