In the near future, I will add an option for exporting/importing workspace settings. This will include media queries, preferences, and suggested styles (enable Preferences > edge mode to see suggested styles).
But for now, you can try the following workaround:
Go to a site that has all the MT media queries set up
Go to Packs > Export
Name your export ‘Media Queries’
Select at least one folder, and then click the EXPORT button
Go to Packs > Manage, then download the Media Queries pack as a zip file
On the new site, Go to Packs > Manage
Install the zip file
Go to Packs > Import, and import the settings with overwrite (assuming this is a completely new install)
This will also import the actual CSS styles. So to start fresh, choose the History > Reset everything option. That will reset the default empty folders, but won’t overwrite workspace settings (e.g. the media queries you imported).
The media queries will now be there with the correct labels. You may want to delete MTs default media queries, if they are also present
A potentially more convenient option, with the downside that you will have to add the labels again, is as follows:
Create a file with your media queries written as valid CSS code e.g.