User preferences lost between Hugs upgrades on Windows

Hi,

The settings on Windows are stored under a registry key for each
specific release. This means that if you install WinHugs, carefully
set up everything, then upgrade, you loose all your settings.

I know that in the past this was done because successive versions of
Hugs could choke on the options for the previous version. So can I
make the suggestion:

* We agree to make the options string consistent from now on, not
changing its meaning.
* We move to using the current registry key for all future releases.

Thanks

Neil