setup: parameter stickiness

[Thomas Wolff via Cygwin-apps]

Hi,
if I have two cygwin installations, e.g. C:\cygwin64 and
C:\cygwin64test, the setup program is sticky about its root directory,
local package directory, and download sites presettings. They tend to
stay at the second installation even after updating the first one, so
that I have to fix it manually every time I update my main installation
(unless I fiddle them out from the registry, or fix them via command-line).
Would be good to remember the last-in-use values.
Kind regards,
Thomas