It's a bit of a hack but it works:
- First select all your contact (ctrl+A)
- Right-click and select "Send as Business Card" (this will create a new email for you with all vcf cards attached. This can take a long time, be patient!
- In the new email select all the attachement (ctrl+A in the "Attached" field)
- Drag and drop the attachements on a fold on your computer... Et voilà!
Bonus tip: you can consolidate your vcf files into a single file (for gmail import for example). Just start a command prompt, go into the folder that contains you new vcards and type:
COPY *.vcf MyNewFIle.vcf
If you cannot drag the attachments from the draft mail, send it to yourself and get them attached once you receive it (or check in sent mail)