Do realize that Fireworks is no longer developed or supported by Adobe since May 2013. A number of features are outdated as well.
I had the same frustrations. After chatting online with Adobe customer support, they suggested I call the sales support number (1-800-585-0774) and purchase a license over the phone. Happy day!! It worked. It sells for $299 (worth every penny in my book...I use it everyday). I will miss future editions of Fireworks but I'm so glad for a reprieve. So not looking forward to having to learn Photoshop.