This is due to license restrictions that we did not understand before the initial announcement was made. After that date users will have to pay a nominal fee of $6 to obtain the BW9 Mac Public Preview. If you obtain the BW9 Mac Public Preview through our webstore by, there will be no fee for it. We’ve just been informed of license restrictions that force us to amend yesterday’s email announcement. The folk at BW9 write (in clarification of yesterday’s announcement)