I think this is how it is done:
1. Go to the system where the stores are.
2. Run:
StoreOnceSoftware --stop_store --name=Test (here "Test" is the name of the store)
StoreOnceSoftware --delete_store --name=Test
But I don't know if this is a clean process. The IDB resides in a different server. The cell manager was supposed to clean this up.
Also, I had created a test root store and some test stores in the cell manager. After deleting the stores through these commands, there were still folders that started with "dvol_" inside StoreOnceLibrary. Should that folder not be clean after running this utility since all the stores are deleted?? Is this because the root store still remains?