So our garage door torsion spring broke. After looking at it and researching more on the subject I found a video for unwinding the still working side.
How to to unwind:
Replacing the spring would cost $120 just for the part because it was a unique model from Wayne Dalton. The part is very easy to work with but not as tough as a standard garage door torsion spring.
Part:
https://www.waynedaltonparts.com/products/wayne-dalton-torquemaster-spring?variant=33523641609
We ended up deciding to replace the whole thing with a standard setup that would last longer in the long run.
For comparison the smaller spring and cable next to the larger in the new system:
