Hi sivan,
there was a bug in the memory management while running led, which is now fixed (actually it was a pretty giant memory leak ). I'll upload version 0.040 in a few minutes with quite a log of fixes and some new features in it - it would be great if you could check if there's still an issue when you crash the engine.
best regards,
timo

edit: okay it'll take until this evening, as i just discovered a damn bug which will take some hours to fix.