Don't know what Wallet you use - but mine has only one address (both for sending and receiving).
If I wanted to setup another wallet, I can of course create another - but transfering funds inbetween them requires the full fee.
1) Copy that address into your clipboard
2) Click Help \ Debug \ and go to the Console tab
3) In the console, type:
dumpprivkey
paste-the-address-from-1-above4) Press enter
That's your other key.
My Multibit does not have a Help/Debug option or a Console tab
See the problem? I knew you'd state something like that. There's a ton of feature-rich tweakable Wallets out there, but those are not meant for the average user.
The recommended Wallet downloads given by bitcoin.org are described as follows :
Bitcoin-Qt
Bitcoin-Qt is a full Bitcoin client and builds the backbone of the network. It offers the highest levels of security, privacy, and stability. However, it has fewer features and it takes a lot of space and memory.
MultiBit
MultiBit is a lightweight client that focuses on being fast and easy to use. It synchronizes with the network and is ready to use in minutes. MultiBit also supports many languages. It is a good choice for non-technical users. From what I know, it seems the Bitcoin-QT description is at best misleading or downright wrong concerning features (depends on point of view).
The average user is not supposed to understand & run the compiled QT application, as he doesn't need most of its features for BTC transactions.
(might be paranoid, but running the QT node i.e. on a normal Windows machine advertising its presence into the network -while holding the wallet- always seemed not quite a good idea to me, obviously not because of Bitcoin-QT security concerns, but because of the platform it runs on in this case)
That means the "standard" Wallet offered by Bitcoin.org does not have many of the options the BTC network actually offers, hence my original comment.
