and sky_queen3 you can find them with tileset animation editor on wah :3
When you want to change the size of a sprite you have to switch the preferences from "Index" to "All". If you don't NSE thinks that you just want to change the stored size variable in the index, instead of re-pointing and resizing all of the frames and changing the stored size var.
Just switch to "All mode"
Seems like I'm going to have to write a guide to NSE...