I have a few MOJO and am playing around with the Windows wallet
Say, for example, I have three wallets: A, B and C
And I'd like to send coins from Wallet A to Wallet C, but don't want to touch the coins in B
Is there a good way to do this? I am not seeing any option that allows you to specify which wallet to send from
Do you mean 3 addresses? You can go into coin control and see which addresses (A,B,C) have which amounts of coins in them. Then you can send coins from address A to address C without touching address C. Is this what you mean? To enable coin control go to Settings>>Options>>Display and check Display coin control and hit OK.
Then go to Send>>Inputs and select List mode and it will list coins and to which address they are in. Hope that is what you were looking for.