From the Developer's web forum:
--
Version 0.966 corrects some synchronization issues with 0.964 that could lead to orphaned processes sitting around on your computer. This seemingly correlates with lost download lists and difficulty connecting to the network. Because these orphaned processes can still be around from 0.96* installations, you ought to restart your computer before installing 0.966.

0.966 places the "Incomplete" folder in the correct location (as a subdirectory of the download folder).

Finally, thanks to a text rendering optimization, 0.966 should be noticeably faster when scrolling through very long lists of results.
--

I would suggest to people that they check things out first before randomly attacking people on grounds that are baseless. I enjoy Acquisition and am glad I purchased it.