DS Stopped working on my mac

Hello,

I am using Draftsight since quite a time on my MacBook Pro late 2010 for architectural plans. It stopped working. Impossible to launch the program. I've uninstalled it totally and reinstalled a few times, nothing works. I don't understand because it was working perfectly before.

Here is the error message :

Process:         DraftSight [471]

Path:            /Applications/DraftSight.app/Contents/MacOS/DraftSight

Identifier:      com.3ds.draftsight

Version:         ??? (???)

Code Type:       X86-64 (Native)

Parent Process:  launchd [132]

Date/Time:       2015-02-28 11:04:29.920 +0100

OS Version:      Mac OS X 10.6.8 (10K549)

Report Version:  6

Interval Since Last Report:          846574 sec

Crashes Since Last Report:           3

Per-App Crashes Since Last Report:   -4

Exception Type:  EXC_BREAKPOINT (SIGTRAP)

Exception Codes: 0x0000000000000002, 0x0000000000000000

Crashed Thread:  0

Dyld Error Message:  Library not loaded: /usr/lib/libc++.1.dylib  Referenced from: /Applications/DraftSight.app/Contents/MacOS/../Frameworks/QtWebKitWidgets  Reason: image not found

Binary Images:    0x7fff5fc00000 -     0x7fff5fc3bdef  dyld 132.1 (???) <486E6C61-1197-CC7C-2197-82CE505102D7> /usr/lib/dyld

Model: MacBookPro7,1, BootROM MBP71.0039.B0B, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB, SMC 1.62f7

Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MB

Memory Module: global_name

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (5.10.131.42.4)

Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports

Network Service: AirPort, AirPort, en1

Serial ATA Device: Hitachi HTS545025B9SA02, 232,89 GB

Serial ATA Device: MATSHITADVD-R   UJ-898

USB Device: Internal Memory Card Reader, 0x05ac  (Apple Inc.), 0x8403, 0x26100000 / 2

USB Device: USB2.0 Hub, 0x05e3  (Genesys Logic, Inc.), 0x0608, 0x26400000 / 3

USB Device: U3 Cruzer Micro, 0x0781  (SanDisk Corporation), 0x5406, 0x26420000 / 4

USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8507, 0x24600000 / 2

USB Device: USB Optical Mouse, 0x0461  (Primax Electronics), 0x4d81, 0x04100000 / 2

USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x06600000 / 4

USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8213, 0x06610000 / 7

USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0x06500000 / 3

USB Device: Apple Internal Keyboard / Trackpad, 0x05ac  (Apple Inc.), 0x0237, 0x06300000 / 2

Thanks.