I have a similar issue, but it is not Java.
Fireworks CS6 worked on my MacBook Pro OS10.10 a month ago, then started crashing during use. Now it no longer finishes launching, and just hangs. I've deleted the prefs, reinstalled Java, uninstalled/reinstalled Fireworks, and been through multiple circles of support on forums/chat/phone. Nothing makes Fireworks work, and since CS6 is the most recent version -- downloadable through the Creative Cloud, but NOT SUPPORTED via the Creative Cloud -- I'm stuck with Fireworks.
IS there support for this product, or isn't there? If so, where do I go to engage it? Thanks!
I tried same things, hehe and got no answer or help.
I've finally restored my imac to factory settings... and reinstalled CC and the apps.
Fireworks worked again...