Find and Open "Preferred Application" in the main menu.

Choose "Terminator" in the "Preferred Application" dialog.

This will set terminator as the default terminal app for the system.

1. You can use "CTRL + ALT + T" to open terminal.
2. RClick and open context menu in Nemo File Manager in any directory and open the terminal from there.

These will all open Terminator or the default terminal that you've set.

Find and Open "Preferred Application" in the main menu.

Choose "Terminator" in the "Preferred Application" dialog.

This will set terminator as the default terminal app for the system.

1. You can use "CTRL + ALT + T" to open terminal.
2. RClick and open context menu in Nemo File Manager in any directory and open the terminal from there.
3. If there is an "arguments" field, change it from "--" to "-x" when using Terminator or you will not be able to execute scripts from Nemo by double clicking.

These will all open Terminator or the default terminal that you've set.