So, after experiencing the same problem as the OP, I went back into my ship catalog. It seems that you must close the launcher, then re-open the launcher, and then the catalog. It then updated and showed the imported ship.
Maybe the catalog just has a problem updating itself after an import/export.
EDIT: After going into the actual game, I tried to buy one of the ships I imported. It did nothing. So yes, I guess it is broken.