So I downloaded a map and ended up making my own version that was modified extensively from the original. New enemy spawn points, weather that the original didn't have, drastically changed terrain, completely changed waves... yeah it's really different. But since it was originally based on their map, the game thinks it's already uploaded to the Workshop and I can't upload it.

I can understand this mechanic to prevent plagiarism, but due to the extreme changes I've made I feel like there should be some way for me to upload the map without having to rebuild it from the ground up.

EDIT: Nevermind, you can re-download an image file to get the terrain back, I'll still have to rebuild all the other things though.