Hi,
using David 5.0.5.1377 on Win10 x64.
I scanned an object today where I started with capturing textures. After the first scans I turned textures off and continued scanning. Alignment all went fine. But each time I tried to fuse the result, David crashed when the progress bar was almost finished. I restarted and tried 2 more times. Only after I deleted textures from those first scans, Fusion finished successfully.