.osp file corrupted after crash while editing

[xXOvOXx]

I was editing a project of about 15mn long. I experienced a crash while I was duplicating a title. I restart the tool and when I loaded back the project file directly from the tool using the Open menu I got this error dialog box:
  "There was an error opening this project file. Please be sure you open the correct *.osp file. "

If I try to start the project from Nautilus (the OS browser), OpenShot Video Editor freeze and never gives hand.

I lost one-day work. I have to recover my file by any means asap. I have looked the ASCII .osp file but it's quite difficult to understand the problem location as soon as I don't know the structure.
Can some developer have a look to this bug ? Thanks.

syslog:
Apr 28 22:29:53 neptune kernel: [48790.355255] openshot[24761]:
segfault at 19 ip b48d3598 sp 82efc64c error 4 in libmlt.so.0.8.8[b48ca000+28000]

Architecture
32 bits

Operating System & version
LSB Version: core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 13.04
Release: 13.04
Codename: raring

Installation Method :
Ubuntu RPM

Version of Openshot installed :
OpenShot 1.4.3

BZR Revision used (if any) :
don't know!

MLT/melt version:
melt 0.8.8

FFmpeg (i.e.libavcodec) version :
/usr/lib/libavcodec-cinelerra.so.51 -> libavcodec-cinelerra.so.51.57.0
-rw-r--r-- 1 root root 5448244 oct. 14 2013 /usr/lib/libavcodec-cinelerra.so.51.57.0

FFmpeg installation :
Ubuntu

[xXOvOXx (ca-nice)]

maybe related to (not sure):
https://bugs.launchpad.net/openshot/+bug/1299306

[gettheinfoandgo (aadriansilver)]

Yes someone please, please help with this! I spent hundreds of hours editing a long video that I can no longer open.

Is there any way to figure out how the file is corrupted? I made another (short) video and compared the text files, but cannot find anything that resembles corruption...

I'm using ubuntu 14.04