Greetings, My name is James W, and I am here to help the best I can. My goal is 100% satisfaction. Let's get started.
It is Highlly likely that when the rope broke, that the spring was damaged when it retracted instantly and with no resistance
I am sorry, I stopped typing when I received no reply for at least 5 minutes.
Usually there is a slot in the pulley that the rope will slide out of when winding
you wind the spring without the rope filling the pulley all the way
this increases the spring tension, and you can slip the rope back on the the pulley through this tiny slot
This is fine if it works
But if the spring is broken, it may not latch on the pulley and you have a very slack rope
this video may give you a good example.
It may not be exact, but close enough