Hello Peter,
Thanks, we've received them.
I suggest to check the memory modules using Memtest86 utility, if no problems are found then try version 1.0.0.
If the problem is still there then please send us the project file with matched images. To do this you'll need to run PhotoScan.app.document.activeChunk.matchPhotos("high", "ground control") command in the Console pane and save the project file, thus we'll be able to run photo alignment without the original image set.