Haha, no problem.
This is a consequence of the Unit Scale, it is set to 0.01 to enable full cross-compatibility with UE4.
If you aren't importing FROM UE4 INTO Blender, then the unit scale is not as important, you can set it back to one, and the meshes should spawn in at a reasonable size.
An alternative is to leave it as it is and scale the meshes up with the scale tool, or using the Object Properties on the Right SIde.
This is one of many annoying little hiccups that I had hoped to deal with promptly, however, about 8 months ago I got a new full-time job in addition to a few part time things that had been keeping me going before that.
Unfortunately, since that time I haven't really been able to keep up with dev on this, and it's been left in a bit of a shambles, as you've experienced.
On the plus side, I'm starting to train someone at my job this week, which should, hopefully, free up some time to let me get back to things that I find more interesting, like this project.
Thanks for your interest, I'll keep you posted!
In the meantime, if you haven't heard of Mr Mannequin Tools, it's an add-on developed by Jim Kroovy, and it handles all the functionality I had intended to add in later versions to the UE4 Mannequin plus way more beyond that, whenever I get back to this template it will most definitely be a part of it.
Thanks!