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 load.py inside.
Restart EDMC

How to use

Once you've plotted your route on Spansh, download the CSV file that it generates
On EDMC, click the Upload new route button and choose your file
The next waypoint is now copied into your clipboard! Simply paste it into your Galaxy Map, and voilà!

Once you reach your next waypoint, the plugin will automatically update your clipboard, so 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