Animation Master is geared to creating pre-rendered animation for films and video. It's not really geared for real-time 3d games etc. It's export options are very limited and there's no list of what 3d formats are supported on the website - but I know that .b3d is not one of them.
There is also no demo version at all - you have to buy to try - although they do offer a 30 day money back guarantee.
You could try asking on their forum at :
http://www.hash.com/forums/index.php?act=idx