As I wrote previously v0.73 had a serious bug which can be disappointing for some long time users, so automatic updating from v0.717 has been disabled. (Though you can still get the new version from the web site.) I wrote it too that the bug has been fixed so why no release yet?
To make it short, I wanted to update the word group study to include a kanji input box like the long-term study does, and I’m in the middle of it. This small change, although seemingly not very difficult, required changing the window where you can set the properties of word study groups. So I went ahead and redesigned the window to make it match the style of the rest of the program. UI changes always take some time, and I also have to rewrite some code for it. The test itself won’t be changed that much, though I’m thinking about redesigning its window as well to look similar to the long-term study. I haven’t decided yet.