From the software
Send a link of your design by clicking Share in the upper right corner of the editor, 'Get Link'.
You will be offered two Share Online options. The Share Link and the Embed Code.
Select the 'copy Share Link' option, as shown in the image below.
From your homepage
From Home or All My Designs, hover over the design you would like to share. Click the three dots as shown below. Tools will appear including Share, then click Share Link.
In either case, click copy to get the share link.
Syncing your changes from the editor
After you've updated your design, click Share in the upper right corner of the editor. An Update Link button will appear as shown below. Click Update Link to update the design on your website with your latest edits.