Thank you! I'll put together a file for upload based on the your most recent revision.
The link to our web page looks fine, and helps to point readers exactly where they want to go if they want a printed copy or fancy layout version. 
Here's the product now on DTRPG: https://www.drivethrurpg.com/en/product/587463/ars-magica-definitive-edition-markdown-text
This seems to be well received, given that already this morning it's had 40 downloads!
I'm really grateful, @OriginalMadman, for all the work you put into this document, and I hope putting it on DTRPG expands discovery of it and Ars Magica as a whole (and brings more players into the community!).
That's great news! Thank you, it really was my pleasure (and I learned a lot). And again, likewise @John_Nephew for going Open License and being generally an awesome steward and ambassador for the best game on the planet. I really hope it spreads a lot more, and I think we've already seen what just a few dedicated people have come up with on the Open License market - there's still a lot of room to grow for the game.