Blender restart required if bake is attempted when current cache directory is set to a nonexistent location

[bholzer]

If you set the cache directory to a nonexistent location, the bake errors and leaves the FLIP interface in an undefined state, requiring a Blender restart to continue.

The UI is left with a greyed-out "Exporting data..." button an a "Stop / Pause" button.

The error is a "permission denied" error, appearing to originate from line 38 in export.py

[rlguy]

Hey bholzer,

Thanks for reporting this! I have added an error popup message for when the cache directory cannot be created that will no longer break the scene. This fix will be included in the next version update (1.0.4).

- Ryan