I used it a long time ago. Different version, but similar functions and workflow.

A few things, just from memory and from some knowledge of how some other similar proggies work:

Don't rename the figure in the CR2 for best compatibility options. Renaming the cr2 is fine, but if you rename the figure, some progs might not accept it. (This is hit or miss and I don't know why they're choosing to read the user-selectable name instead of the protected figure designation.) Also, load the figure up and let it be the only figure of its class in the scene. (ie: Not the second V4 in the scene.) Then, save it as a cr2, so you don't get the V4 1, V4 2, etc autonaming issue.

Make doubly sure that there is only one figure in each of the cr2s. If you have a conformed figure in there or anything other than just the geometry and rigging that's supposed to be in there, it will probably balk as you describe.

It has been a very long time since I used that program. (I do that stuff by hand, as necessary, these days.) It IS, however, a very nice program for what it does and it gives you far more options than most with a very nice ability to hand edit, visually, the morphs and such. I would not hesitate to recommend it to anyone interested in that sort of thing.

As always, on today's OS's, make sure the program has access to what it needs. Set it to always run as administrator, especially if it's accessing things out of its directory structure and writing/caching outside of it.