I am not an expert in that subject, so someone else like
@weaver may have to confirm.
You can probably either have the theme and theme support plugin installed before, or you can move them with the rest of your data.
Either way, the settings are stored in the database, so when the theme and plugin are activated, the settings should automatically be activated with them.
You should of course download all your settings before in case you have to reload them.
If you dont have “Plus” so that in Save / Restore > Download ALL settings.
If you have “Plus” also go to +Xtreme Plus > Save / Restore > Download ALL settings