Hi,
We experienced the same issue.
We created a project based on existing backlinks (around 6000 backlings).
We deselected some backlinks factors (-domain age, alexa rank, all PR values) in order to reduce the processing time.
But SEO SpyGlass stopped responding after 7 hours of processing.
This happened several times.
Above 3,000 backlinks, the probability that the application crashed is quite high.
Moreover, the application consomes huge memory.