Unfortunately, the windows version is still loaded with bugs. I don’t know if these are cross-platform or not. Out of about 40 bugs remaining, I have posted the top dozen–bugs that cause lockups, give erroneous results, etc:
bigweasel.com/Colorthink_Buglist.pdf
Please let me know if these bugs are reproducible on your system, and what platform you are on.
Thanks.
–John