FeedDemon 1.5 BETA 3a is now available. As you can see from the release notes, there are a number of changes in this build, the most notable being podcasting and improved enclosure support.
After downloading beta 3a, simply install it directly on top of your current version of FeedDemon and your existing data will be retained. However, given that this is a beta release, I recommend backing up FeedDemon's cache folder before upgrading (if you're not sure where this folder is, select File > Manage Cache > Explore Cache Folder).
Note to translators: FeedDemon's language file is likely to change in subsequent betas, so I recommend against translating it until version 1.5 has reached release candidate (RC) status.