Move repository location in GUI configuration

Windows 10, Duplicacy Web Edition 1.5.0, CLI 2.7.2

I wish to move a folder that I am backup up to a different location. How can I tell the GUI that the repository has changed locations?

This post seems to only address the cli version. I have only configured backups via the GUI.

Can I just alter the duplicacy.json file in my home folder to have the new location or is this configured somewhere else?

This should work, but an easier way is to create a new backup with the same backup id (and remove the old backup to avoid conflicts). When you run the new backup it will back up files under the new location but still use the last backup in the old location as the base for deduplication.