Germany
if you are unfamiliar with database management tools, then take HeidiSQL http://www.heidisql.com/screenshots.php?which=data it can much less administration tasks, but enough for those wanting just change some data...
You need to select "Alter table", and then chose the hostname table.
"alter table" alters the table itself (i.e table fileds), and he needs to change table data.You need to select "Alter table"
Germany
Did you stop the TVServer service before trying this? The service would keep the database open, and therefore saving it under the same name is not possible. If this doesn't work, then I don't know.But when I try to save it I need to give a filename and a location, like "save as".