HarperDB can fairly easily be moved or migrated from one location to another. Simply copy your entire HDB_ROOT, wherever the harperdb data lives, from one place to another. Then you are going to want to go into HDB_HOME, wherever the application is installed and change the file hdb_boot_properties.file which can be found into the top level of your HDB_HOME folder.
Then edit this file
Then edit the settings_path to reflect the new location of your settings file. Make sure you do not edit install_user as this will cause numerous permissions problems.
Then find your settings file which can be found in HDB_ROOT/config/
Then edit PROJECT_DIR, HDB_ROOT, CERTIFICATE, and PRIVATE_KEY? to reflect their new locations.