There are 2 ways to create a finished mix that includes Scope synths:

1. If you have already bounced down your Scope synths to Audio you can simply select Session =>Export=>Export to Audio Files.

2. Alternatively you can bounce your whole mix to a stereo Master track and then export the final mix track.

If you choose Option 1 above, then the Window to the right will pop up.  There are various options presented regarding the file name presented.   One easy and quick method is as follows:

1. Ensure the path includes the 'export' folder (a folder than Mixbus creates when the project is created).

2. Select 'No Name' and provide the song name in the 'Label:' field.

3. Deselect 'Revision' and 'Timespan Name' unless you wish to keep multiple versions

4. Press the 'Export' button