in supernova it shows ./ in front of cpuminer, and without the .exe
That's how you would run the command if you were on Ubuntu or any other Linux OS. Can you paste your whole command?
Suprnova seems down for me right now also, wouldn't cause your miner to error out.
Turns out that supernova is linked to an incomplete miner for windows.
ya i got them from where i mentioned, pinned to #mining in slack ;p
i take it that means you got it up and running then i hope?

ya its not a big deal at this point cause ya as OC said
below, there will be new miners and hence new binaries anywayz soon ;p
clear and complete understanding for this project is very necessary....