This type of forums are extremely useful for help and improvement of the program. But Dex suffer from the same problem as many other softwares - there are but a few of the users that takes their time to contribute in the forum.
How about adding a small box (optional of course) to the software itself that shows just one line of the forum.The latest topic.
If it occupies very little space people maybe let it stay enabled and it might push users to use the forum. Clicking the subject links directly to the forum of course.