Aperture Crashes Every Time on Launch Following Large File Manipulation

Question

I've been using Aperture 2.1.3 (and previous) to work on bigger TIFF files (200MB+) which are scans of large format negatives (made with Silverfast AI Studio). I routinely get the "Red Screen of Death" (Unsupported File Format) but restarting Aperture fixes the problem and lets me work for another 5-30 mins before needing another restart. Usually, before it gives the Red Screen or a crash it draws a horizontal white line of single pixels across the right side of an image I work on. Also, randomly, some versions just show all in black.
All of those files work perfectly in Photoshop CS4 (and CS2).
Unfortunately, as I tried to create a new version from master today Aperture crashed but it will no longer start properly. It starts, shows me the usual screen and I even get a chance to quickly click on a project, but about 5 seconds after starting it crashes, always, and every time.
How can I fix it?
Can I, perhaps, delete the most recently edited master from the library somehow, assuming that it is causing offence?
Would anyone with Lightroom experience comment if it is more stable?
Many thanks,
RL.

Answer 1

I wouldn't claim any Aperture expertise, but you seem to have answered the question I just asked in the Aperture vs Lightroom topic (http://discussions.apple.com/thread.jspa?threadID=1999997&tstart=0).
My solution, unfortunately, was to migrate to Lightroom.
Thanks!