Trying to translate Rise (Articulate) XLF files with Studio

I'm trying to translate Rise (Articulate) XLF files with Studio. According to the Rise help, that should work flawlessly with any professional translation tool. The file imports into Studio, but it shows up empty and the word count is zero.

Has anybody successfully worked with Rise files recently? The few forum entries I can find on the subject are several years old ... 

Thanks in advance for any ideas on how to go about his!

Eva

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