Please note that Micro Niche Finder 5.8.2 for Windows still works just fine. In fact, we use it almost everyday to get multiple niche ideas, to research anchor text for high pr links, and to find profitable buyer keywords for our Yahoo/Bing Ads PPC campaigns.
Nevertheless, as of Jan 2015, we have learned that The Net Results has discontinued sale of version Micro Niche Finder v. 5 while they are working on the new (cloud-based) version of Micro Niche Finder. The new version (assuming it will probably be called Micro Niche Finder v. 6.0) will be accessible to users with Windows, Macs, and Linux machines -- probably will be usable to most tablet and some smartphone owners as well.
We contacted The Net Results recently, and Stacey told me that they are projecting a "soon upcoming release" of the new version. So, expect Micro Niche Finder 6.0 no sooner than Spring, 2017.
In the meantime, you can't get buy without competent keyword research; so we are recommending that you supplement your keyword research toolbox with one of the outstanding long-tail keyword research products below.