#275 fwbuilder OSX crash and corruption of .fwb file

[Alex Russell]

Hi There,
I'm running 5.1.0.3599 version of FireWall Builder on OSX 10.11.2 (El Capitain).
This is the first time I've used the application.

The interface has crashed on me a few times and seems to keep corrupting the saved configuration file.
After a crash when I go to re-load the file it does not load anything in the right hand pane (I still see the 'create new firewall button') but on the left my saved objects are present.

This has happened to me three times and becuause the saved file will not load correctly I cannot continue where I left off.

The corrupted file is attached.
Thanks