BTW: Shouldn't the tooltip be: ...to a new translation memory?
Same question for the Microsoft glossaries in tbx format:
For the time being: use Glossary Converter or Goldpan TMX/TBX Editor to convert them to tab-delimited.
Or use Excel for Windows:
Probably possible in LO Calc too, but I don't know how (yet):
I have download this TBX file with terminology German <> Dutch from IATE, without making any selections for the fields.
The file isn't loaded in CafeTran Espresso: