That was the text editor of my choice throughout college years. Versatile and agile, but not fragile. ♥
Apparently it has survived ups and downs of the past decade, and is available (even for purchase!) as TSE (The Semware Editor).
I am seriously considering buying a copy. Not the GUI-based TSE Pro, but TSEJr—the direct successor of QEdit. 'cause I miss good-n-old DOS applications. XD