In the HW user manual (page 25) it says
Changing installation locations
If you have Hauptwerk installed but you want to change the locations you installed it to, you will need to re-run Hauptwerk's installer, selecting the Custom option in the installer, which allows you to choose where to install. The installer will attempt to move your existing installation's folders to your newly-selected locations and update Hauptwerk accordingly.
We strongly recommend using Hauptwerk's native backup functionality (File | Backup your Hauptwerk settings and personal data, covered in the Backing up and restoring your settings and data section), and making sure you have the original installation media for all sample sets to hand, prior to re-running the installer to move folders, in case anything goes wrong during the moving process (for example, in case storage space runs out, or some sample set files or folders can't be moved because of insufficient permissions, or the computer ‘times out’ some part of the process, or the computer goes to sleep).
This does not reinstall but allows you to change the location of key HW datasets (including the cache files).
The manual includes a good index which can help you find this sort of thing. (RTFM, read the
fine manual)
I trust this helps.
Iain