[Dx4win] .QSO File Type

[Lee Finkel]

Lee, KY7M

I stumbled across an old contest log file never imported into DX4WIN.  I
have tried opening it in Word and Excel with limited success (no dates or
times, only callsigns, RST and Power.  It appears to be from ARRL DX Phone
in 1992 and the file type shows as "QSO" while others show up as BIN, etc.
in Windows Explorer.  Does anyone have a clue as to which contest program
would have produced such a file extension or how I can try to convert it
into something useful?

Lee, KY7M