Save CTY.DAT to your CT Win directory, which by default is C:\Program Files\K1EA Software\CtWin
If you did not install CT in the default location, save CTY.DAT in the same directory as CTWIN.EXE
CT 10 (DOS)
Save CTY.DAT to your CT directory (the same directory where CT.EXE is found)
CT 9.91 and later
Save CTY.DAT to your CT directory (the same directory where CT.EXE is found)
CT 9.90 and earlier
Save CTY.DAT to your CT directory (the same directory where CT.EXE is found)
CT 8 and earlier
Save ARRL.CTY, CQWW.CTY and IARU.CTY to your CT directory (the same directory where CT86.EXE, CT286.EXE and/or CT386.EXE is found)