This version is MUCH better than 1.5 in dealing with large numbers of fonts. It still takes a while to process them all, but it shows progress and doesn't lock up. Great!
What I really would like to see it do is to remember which fonts were activated between program launches. Right now, if I want to browse all of my fonts in the main browser window, I have to turn them all on first, which takes too long to just do casually. Ideally, the categorization functionality of this application would be integrated into a font manager like FAP.