Found the issue.
The outdated woocommerce template files in my theme were not building the correct actions so the scripts were never launched since the were hooked on the woocommerce_thankyou_swish action.
The callback is working and updating correctly with another swish-plugin: https://redlight.se/swish/, but I’d rather use yours 🙂
I can confirm this issue.
Download manager 2.3.6
Wordpress 3.4.2
All file sizes.
