How come schematics for mcedit aren't supported?
1
They are, you just have to compress the schematic/file before uploading it though. If you don't know how to do that, the image below should explain how to/show you.
Simply right click the file/schematic and select send to --> Compressed (zipped) folder

Simply right click the file/schematic and select send to --> Compressed (zipped) folder

