Please advise on how to fix this problem.

After not using Draftsight over the Christmas break, a pop up informed me the licence had expired.

On previous occasions when this has happened (usually after a holiday break) I have reinstalled and activated successfully. Now, when downloading the updated version, it will not open, and goes straight to a crash report which states:

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

I am working on a MAC OS X 10.6.8.

There is no option to "activate" or launch. It goes straight to crash.

Please advise ASAP on how to sort this problem as I cannot work!

Thank you