Root directory preference for 64-bit setup

[Mike Taves]

When running osgeo4w-setup-x86_64.exe the first time, the default root directory is shown as "C:\OSGeo4W64", but I changed this to "C:\OSGeo4W". However each time I re-run setup from either the same installer, or from the setup package, it insists that the default root director is "C:\OSGeo4W64", even though I have changed and installed it to a different directory name.

In a previous version, I recall that the installer was able to retrieve this preference for the root directory.

[jef]

should be fixed - feel free to reopen.