When do personalized addresses fall off?

[RahRahRah]

I'm trying to setup Subsonic with FreeNAS. I hosed the permissions the first time but I had already chosen a personalized address. I ended up having to scrap it and start over. I'd like to use the same address I had chosen before, but now it gives me an error that says "Status: The web address "MyAddressIsListedHere" is already in use. Please select another."

I can't find any reference to "claiming" an existing address on the main site and I can't search the forums because "address" and "subsonic.org" bring back the error "The following words in your search query were ignored because they are too common words:" and a search for "personalized" didn't bring back anything relevant.

Does this address fall off usage and become available again in 30 days when my original demo expires? I've signed up for premium now that I've got it working, but I have no idea how to reselect that earlier address. Any suggestions? Is there a page on the main site I'm missing?

Thanks!