Cheat Engine's built-in script editor is extremely basic and lacks many features such as autocomplete, extensive code-highlighting, and search-and-replace.
This utility allows you to use the editor of your choice by automatically syncing any file on your PC to the Cheat Engine record list (where scripts are stored and executed from).
A basic GUI can be accessed via the Edit menu that allows you to see all scripts that are currently being synced in the table.
Both the GUI and the main Cheat Engine form support dropping files onto them to add to the sync list, as well as a right-click action to disable synchronization.
Checkmarks are added to records to identify synchronized files.
