Are you sure it will still work after?
Didn't Badspot tweak the engine so he could do this?
No, all he did was edit the default Tree's .blb. If anyone edited it, the launcher would redownload the Christmas version. How else do you think I got the .blb for the Christmas Tree? I packaged it and renamed it, so it is a seperate brick, so when the default Tree goes back to normal, the launcher won't get rid of the Christmas Tree, since it is it's own Add-On now.
Basically, yes it will still work after. I am 100% sure.