The file is an archive (ie a zip file) containing a xliff, a TMX and a TBX. You cannot import the wsxz file as it is in Wordbee. But you can unzip it an import each files individually.
I recommend you to download "7zip" (http://www.7-zip.org/) to unzip the file.
The files that need to be imported in Wordbee are:
- The .xlf is the file to translate. You have to create a project for example English (UK) to French (France);
- The .tbx is a terminology database. You can import it as a new resource and then attache it to the project mentioned above;
- The .tmx is a translation memory. You can import it as a new resource and then attache it to the project mentioned above.
Once the translation done you will have to download the translated Xliff file and replace the source Xliff in the wsxz file by this one.