EDIT: These instructions were originally written for ICONOMI test token (t-ICN), but since test period is over, we have on October 24 updated them to work with real ICN token. Since end of October, MyEtherWallet natively supports ICN — we have updated instructions accordingly.
You do not need to set up anything in MyEtherWallet, as it now natively supports ICN apptoken. To view your ICN balance/send tokens, proceed as illustrated.
2. Click Send Ether & Tokens
3. Select your wallet. You can select Json/UTC file if you have that and upload or click Private Key and copy and paste your private keys. Enter required authentication, and click Unlock your Wallet.
4. Click Show All Tokens on the left side.
5. On the left side of the screen ICN should appear among the list of tokens, showing your balance.
ICN tokens can be sent to any ETH address.