winhugs98 bug of -F

version: Hugs version Nov 2003
Start winhugs => set Hugs interpreter options => set s, t, and w options
on; and change editor to TextPad => OK => close winhugs
Then
Restart winhugs => Error dialog : FATAL ERROR - Unable to load Prelude

at this time HKCU\Software\Haskell\Hugs\WinhugsNov 2003\Options registry
item has these strings at the end:
...-c40 -F"" " "
By removing the -F option and the remaining portion, it revives the
winhugs back to life.

My environment is Windows XP Professional Version 2002 SP 1
Dell INSPIRON I8200 Intel Pentium 4 Modile CPU 1.7 GHz, 384 MB

FYI

    Takei