I have updated the patch and nothing is changed. I'm still having the same problem.
As mentioned above, I am using the radio widget available under Interactions>Learning Interactions>Radio Button Widget. I tried to insert it from the Gallery subfolder like you said, but not only was there no radio widget to be found, but all the options there were greyed out.
Again, my whole project plays through smoothly without any snags and then, right before the slide with the widget on it, it loads for about 20 second and when the slide finally appears, there are no radio buttons! What should I do?