McAfee FIX 1
McAfee anti-virus can cause this. Download the Microsoft redistributable package from http://www.microsoft.com/en-ca/download/details.aspx?id=13523.
McAfee FIX 2
Instead of uninstalling McAfee, right click on the McAfee icon/change settings/Real Time../Parameters/
Into first topic , change from "ALL files ( Recommended)" to Program&Documents Only.
McAfee FIX 3
other option is to pause real time scan for a while
In that folder, change the name (to simulate a delete) or actually delete the following.
I personally added a _ after them.
for example. This makes it easy to restore if needed.
After that, you start Fireworks, and you are done. It will recreate these files and the language folder. Error gone, all good.
Note that font issues often seem at the core of it all.
You might be able to save your work, even though the error has already cropped up, by simply quitting your font-management software. On my Mac closing Suitcase Fusion completely elimintated the problem and my documents could ALL be saved.
The problems are only going to get worse as time progresses and new OS updates are released. Fireworks' development was killed in May 2013, and is no longer updated.
And even at that time FW was lagging behind the curve compared to what was happening in front-end web development.
I used the options 1 and 2.
and yet, it's still offered as a trial download... hmmm
Yes, I know - it's a bit silly, if you ask me. I suppose Adobe stops selling CS6 licenses FW will truly be dead and gone. For now it's a rotting ship and its remaining crew (the users) are left to themselves to patch it up the best they can.