First off, open XWDP v15.1 and ensure the Local designs gallery is visible.
You should have 6 blue folders visible.
Right-click and pick Download All for each folder. Try "Social Media" fist as this is the quickest. When that has downloaded, you will have "Social Media (updated)".
The whole operation is 2.4GB so the download time will be long as Xara throttles the speed and there are so many small files the latency is high.

In C:\Users\(musicmanrobert)\AppData\Local\Xara\WebDe signerPremium\15\Cache\designs\eng\, all the downloaded material can now be copied to a USB.

You can repat this for your second activated account, wthout needing the USB stick.

If you want to add the content to a hard drive, just copy across.

For another activated Xara application, you can use the Disc Designs button to add in the path to this location.

Acorn