TimM wrote: just deleting the cache file would be best for me...
Here's a shortcut to find which cache file belongs to the Organ you want to delete. Just load that Organ one last time in Hauptwerk (using the configuration from which you wish to delete it), but this time load it using the feature that forces you to specify exactly which ranks to load and how to load them.
This will force Hauptwerk to regenerate the Cache file for that one organ, in that one configuration. (If you only specify a few Ranks to load, it won't even take very long to do this.) Now exit Hauptwerk and look at your Cache files... sorted by time and date. The one file with the newest (current) Time and Date will be the one you want to delete.
And even if you accidentally delete the wrong one... no real problem either, because the next time you load that Organ, Hauptwerk will regenerate that Cache File for you... using all of the same Parameters as previously!