I've built my own bot from the free one you're talking about. It uses image detection to detect the red exclamation mark and then auto hooks. it then auto equips lures using similar logic every 20 mins.
Happy to share this out if anyone wants it or can improve it

Right now ive only trained it to work with Antique Fishing Lures. Not sure how easy it is to read the memory of the game or call to item IDs via API for a more robust method than image recognition