Replace old references to HBIC with HLU

Replace any old references to the namespace HBIC with the correct
namespace HLU.
Upgrade user.config in new releases.

Add setting and call to function to upgrade the user.config when first
running a new release.
Change CallUpgrade user setting to Roaming

Change the CallUpgrade user setting from Local to Roaming to match all
the other user settings.
Amend installer to upgrade existing versions

Amend the installer so that it can upgrade and existing installed
versions rather than requiring them to be uninstalled first.