Hi Jass,
Thanks for replying!
I realized that the downloads where working just fine, up until I installed WP Super Cache. I also realized that all downloads via your plugin are done via a GET request. So I checked the option: ‘Don’t cache pages with GET parameters. (?x=y at the end of a url)’ and the downloads are working again. Maybe it’s a good idea to inform people about this in an FAQ or something, just a thought.
Thanks for your input! Much appreciated!
Sincerely,
Guido Visser