Export CotEditor settings to an archive file, then import them into CotEditor on another computer.
The settings archive can includes:
Settings: All options that can be configured within the Settings window, such as modes, snippets, and key bindings
Themes: All custom themes
Syntaxes: All custom syntaxes
Multiple Replace definitions: All definitions set in the Find > Multiple Replace menu.
The exported data is saved as a CotEditor Settings Archive (.cotsettings) file.
Tip: You can also export themes, syntaxes, and Multiple Replace definitions individually. For details, see Customize a theme, Define a syntax, and Replace text using multiple rules.
Go to the CotEditor app 
on your Mac.
Choose File > Export Settings.
Select the items to export.
All exportable items are automatically extracted.
Click Export.
Enter a name and choose a location for the exported archive, then click Save.
Go to the CotEditor app on your Mac.
Choose File > Import Settings.
Choose the CotEditor settings archive to import.
Select the specific items in the archive you want to import.
Click Import.
If CotEditor already has a setting with the same name, it is overwritten with the imported data.