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I tried these steps, and unfortunately, this requires recreating calculated fields and aliases. However, this led me in the right direction to resolve my issue. I found that once I added another data source, I was able to get back to the Data Source page and at that point I could edit the old WDC connection and change the URL.
So the solution for my needs was simply to add a second data source, go to the data source page, edit the original WDC location, and then remove the added data source.