How to forever delete a wallet from zcash, to generate new

I have correctly updated from rc1 to rc2, all steps, one by one,
The daemon not sinc then the I can’t download the new chain to rc2.
I still have the rc1 or beta2 wallets.
Any ideas, please?

Thank you very much.

At /root/.zcash/tesnet3/wallet.dat

Finally I have discover it.