Resizing the SD card for the Beagle Black X15

I have put the latest image for the Beagle Black X15 on to a 16GB and wanted to resize the partition but using df -h the file structure looks a bit different just a single ext4 partition plus a number of tmpfs files. I am not sure using existing method of fdisk followed by resize2fs will work
as used for the Beagle Bone.
Any assistance with this would be appreciated

There's a built-in script on the sdcard image:

cd /opt/scripts/tools/
git pull
sudo ./
sudo reboot