I was able to download all the courses I have created or support from MemRise thanks to Eltaurus's Script (as a back up).
I then tried to group them into folders by categories - which I found quite hard.
This is just my suggestion as a starting point to perhaps help NeonCube with grouping them on MLWL. (On MemRise they actually went under a greater variety of groupings)
Art = 8 courses
Bible = 29 courses
Geography & Geology = 39 courses
Italian & French = 87 courses - (these will be covered by your Language groupings in due course. But this category also included Latin and English courses [eg sayings] I look after.)
Nature = 32 courses
Other = 5 courses - (Ziggy, Archery, Terrestrial Temperature, MemRise Rank/ Title and Who directed films)
Space & Astronomy = 20 courses
Places, Maps & Flags = 14 courses
Weather = 18 courses
So I downloaded 252 courses.
But my Profile Memrise - DW7 says I am supporting 277 courses so I guess I did not download some that I did not think were worthy or I had been given access to, but not actively supporting them. Or I may have missed some!
My spreadsheet says I have created 42 courses and support 277 in total which I'm pleased to say matches MemRise's list.