I can not add the symbol to the symbolic information below
0xdbFb423E9bBF16294388e07696A5120E4CeBA0C5
ETHD
18
and gives such a warning.
Unable to add a custom token with the same symbol as an existing custom token. Try clicking the "Load Tokens" button, or choosing a different token symbol
That's because you have already added ETHD custom token in your MEW. Delete that and add again, it will work.
Good luck.