I just checked the Embird site. It says it will write to EXP. So I suggest, if the Bernina machine has a USB port you will be using, save the design as EXP and use a USB stick in the machine. That is a whole lot easier than needing to convert the file by using the Bernina software.
If your Bernina does not have a USB port, you can save it as PES. Then you will need to use the Bernina software and convert it to ART.