Is there some way to "download effects"?

This is an interesting thought. I learnt effects by grabbing a handful from someone else and then modifying them to see what it does. Now when programming I have quite a number of stock effects like colour over background (10x snap 10x fade and so on). When I a asked "can we do this?" I am in a good place to either modify one of my effects or build a new one because I know how to and I play a lot when I have time. 

There is a good series on youtube with David Cane Intro to effects. spend some time there and have the software open on your computer or console and play along.

Maybe this support article helps?

https://support.etcconnect.com/ETC/Consoles/Eos_Family/Software_and_Programming/Common_Effects_and_How_to_Program_Them_on_an_Eos_Family_Console