Fireworks is no longer being updated. CS6 was the last version. It is only in maintenance mode. Depending on what you were using FW for, may I suggest Illustrator and Photoshop as a combo instead.
Here is the statement from Adobe about Fireworks:
The future of Adobe Fireworks « Adobe Fireworks
This recent article suggests some general alternatives such as Sketch, Macaw and Anetype.
What Does The Future Hold For Adobe Fireworks?
If you need prototyping, I enjoy using Adobe Muse for prototyping web sites
Other possible replacements for Fireworks include:
Affinity Designer (Apple Design Award winner).
Xara Designer Pro about near as you'll get to Fireworks:
Evolve UI (Open Source) by Tribaloid
Gravit (currently in Beta and available by invitation)
If you choose to continue to use Fireworks today, you will be interested in Fireworks extension resource sites such as these: