Finally there are stable releases for my Webform Protected Downloads module.
Honestly, it's been a while that both versions (6.x, 7.x) are pretty stable. Currently in use on over 1500 sites (according to the statistics on drupal.org) there have been very few bug reports during the last year. The 6.x-1.x-rc4 had been around for 18 months without any bug report. And the few minor issues in the 7.x-1.x branch didn't do much of a release blocker either.
This was long overdue, I just never came to it. And so I'm glad today that it's finally done. Enjoy and give feedback!