A common problem with new Max users is exporting objects at the correct scale. I had added some attempts to the WW SMD exporter to "wash away" the problems, but I removed those features recently because it is really impossible for me to presume what the user is trying to accomplish.
So if you were getting correct scale in recent exports but no longer do when exporting from WW, please read this new article:
My Model Scale is Wrong: All you need to know about getting your model scale correct. (http://dev.wallworm.com/document/127/my_model_scale_is_wrong.html)