Download the latest release here and unzip it.
Open your EDMC plugins folder - in EDMC settings, select "Plugins" tab, click the "Open" button.
Create a folder inside the plugins folder called SpanshRouter
Open the SpanshRouter folder and put all the files you extracted inside.
Restart EDMC

How to use

You can either plot your route directly from EDMC, or you can import a CSV file from Spansh

Once your route is plotted, and every time you reach a waypoint, the next one is automatically copied to your clipboard.

You just need to go to your Galaxy Map and paste it everytime you reach a waypoint.

If for some reason, your clipboard should be empty or containing other stuff that you copied yourself, just click on the Next waypoint button, and the waypoint will be copied again to your clipboard.

If you close EDMC, the plugin will save your progress. The next time you run EDMC, it will start back where you stopped.

Fly dangerous! o7

Known Issues

At the moment, plotting a route while the game is running, and which begins from the system you're currently in, doesn't update your "next waypoint". If you're in that situation, a couple of solutions are available:

Using the down button below the Next waypoint
Performing a FSS Discovery Scan
Go in our out of Supercruise
Logging back in and out while EDMC is already running.