3.0.1b is the new demo version. The only difference between it and 3.0.1a (the current released purchased version) is that 3.0.1b can import After Effects 7 data without having to edit the data first.
3.0.1b will disappear as soon as 3.0.2 is finished. 3.0.2 will provide the enhanced movie file support that I've been promising for so long. I'm hoping to have 3.0.2 released (or at least in beta testing) by the end of February.