Hello from germany,
i have a big problem to change the default sendig e-mail adress in "accounts".
it seems that zdesktop automatically made the google-mail adress to default sender adress. In "setup" i gave him the alternate smtp account.
I was able to create an new personal sender amail-adress but unfortunality it´s not possible to make this as the default one.
Now I have to choose manually the sender-email-adress via drop-down-menu when I create a new e-mail.
Sorry for my very bad english. Hope that anybody can understand the problem and will give me a helpful solution.
o.k. I think I solved the Problem. I had to delete the account a set up it again to enter the correct data.