I am using the Win004CLIwithfix.rar downloaded directly from the bipcoin site as it is currently hosted. I extracted the files to a new folder on my hard drive. I can run bitcoind and simplewallet. However, the mining commands are now absent from the "help" menu.
In simplewallet:
start_mining [number of cores] responds with "unknown command: start_mining"
mining command responds with "unknown command: miner"
Same with bipcoind when I try the mining command there.
Ok, I was using the Bipcoin v.0004 from 1/16/2017. It looks like the 5/21/2017 version with the security fix doesn't have the start_mining in simplewallet.
Did you try calling miner from the command prompt? It looks like you tried to call it from within simplewallet since you got that "unknown command" error.
miner --daemon-address 127.0.0.1:18871 --address [WALLET_ADDRESS]
which is the same as
miner.exe --daemon-address 127.0.0.1:18871 --address [WALLET_ADDRESS]