changing the base Bitcache path

In /admin/settings/bitcache/repositories I have two bitcache repositories listed: "Default", which is a database; and another that is a Fileframework-based

The problem is that the admin page above keeps erroring that "The directory xxx/bitcache/file does not exist", which was the directory I used before I moved the whole Drupal installation from serve to server (the username changed).

I have otherwise corrected all paths, e.g those in /admin/settings/file-system, but I cannot find a control to change the path to Bitcache's file storage. Certainly not in /admin/settings/bitcache

Additionally, in /admin/settings/bitcache/repository/add the "Location" field recommends placing the new file repository under the default Bitcache directory which it specifies as xxx/bitcache as above.

How can I change the base Bitcache directory after having moved the installation?