Acorn: Do you have an earlier version of XWD Premium?
With XWDP 19 you apparently you do have to upgrade to the subscription base version called XWD Plus now in order to use the PayPal widgets. It's about $120/yearly now.

I am going to see if I can get the code from the PayPal website and paste it into a placeholder; if I understand it that might work. I really don't need all the templates, etc. on Xara, which is available with subscription updates.