I`m not in front of my avid, but as far as I remember you should be able to export your export setting in the settings tab to a location you like. All of your setting are saved within your user profile. If I`m wrong and you can`t export your export settings than you could try to copy your user profile to a different machine open a project and then move your desired export setting to the site settings folder. Then they are available to all user on this system.
Often I save or send files and go to where I thought I sent them, only to find they are not there. I get around this and find my file by doing the same save ans seeing where the setting has it going to. I don't actually save it again as sure enough Avid keeps the same settings until changed and will point me to it's last sent to.