Crash with trim / extend

Hi all,

When trying to trim / extend to all entities (pressing "enter" twice), DraftSight crashes every time. The drawing is small and was created with Acad (it worked fine). I'm on windows 7 x64, all drivers up to date. The command works fine on a small drawing with a couple of lines.

Does anyone know of a way to solve this, it's a really handy command and selecting each entity by hand is sooo annoying !!!!

Thanks,

Vincent