The Derby City's original enclosed shopping hub had been joined by five roofed retail centers by 1978. Its original moniker, THE MALL, became redundant and was changed to MALL IN ST. MATTHEWS in 1984. This morphed into MALL ST. MATTHEWS (sans the "In") in 1989. 

Graphic from https://www.mallstmatthews.com (Website on Internet Archive Wayback Machine)

A multi-phase renovation had started in 1987. A vacant northwest anchor was enlarged (again) and re-opened, as a Bacon's, in 1988. The mall was given an interior face lift, which included the new Picnic Food Court. These projects were completed in late 1989. A Limited-Express Superplex was dedicated in late 1992. The complex now encompassed approximately 700,000 leasable square feet.