character_set_client in v4.1

[nikos]

Hello list
I've just install v4.1.
Every thing works fine exept SQLyong shows all non-latin characters as
question marks and the old Mysql-Front can't connect with tables after
mysql_fix_privilege_tables.

How can I change character_set_client=greek than to latin?
I thing this will solve my problem
Is that right?

Thank you