I'm still using the 30 day trial version I downloaded a couple of weeks ago, so I'm using Version 1.04 Build T201110101145 (the current download version, on Windows 7). I really should give credit to Johan, since I first learned of Zerene from him on this thread: 250 images stacked
Keep us posted, close-up/macro is a current interest of mine, and I'm looking forward to seeing your results!