To add custom token at MEW,
Click on add custom token with these values:
address : 0xf5E39300Ab38d19B777d507A2A52F86e0C0c51B0
symbol : ICX
decimal : 18
First time I'm doing this, is it that address where you sent the money you should use? I search on my address and found the token here:
https://ethplorer.io/address/0xb5a5f22694352c15b00323844ad545abb2b11028 so isn't it that address at the top you should use? I don't know if I can try something that is wrong so wanted to check first what I should write.
-edit- Address in the link above 0xb5A5F22694352C15B00323844aD545ABb2B11028 worked