Found and fixed a problem Rated 3 out of 5 stars
I've noticed a number of reviews reporting that the product stopped working after a while. I happened to look at the options for this add-on and noticed that under the "Opening PDF" tab the path to Adobe Reader was no longer valid, because I was now using Reader XI and the path still specified a different directory that was used in earlier versions. I changed the path to the new location for AcroRd32.exe and the problem was solved. The designers of this add-on should provide a method to change the directory automatically, or at least provide an error message to explain the issue when it occurs...which is why I give it only 3 stars.