Ok go to “Menu / Accounts” and click on your account on the left and then click the “General” tab along the top.
Then change the Name to what you want and save accounts as per the eM Client online documentation screenshot extract below.
(Edit existing accounts)
https://www.emclient.com/webdocumentation/en/10.0/emclient/default.htm#Accounts/Edit%20account.htm
