Just to update this, there is a file called functions.php in the “lib” folder of the plugin, and if you go to line 295 there is a variable there you can set:
“dayOfCycle”: “10”,
I set our copy to zero rather than 10 and saved it, and the autoresponder started working again.
Modify at your own risk!
I make no guarantees, but it did fix the issue for us. And remember, if the plugin takes an update your modification is deleted.
Best of luck…