not possible with the current version...
it will come.
it's not difficult to add.
but the problem is, finding the right area you want to add enemies in will be difficult.
there are no names linked to the areas currently, so, there will be lots of testing to find the correct area you want.
(for example, do you want to edit area 1, area 90, area 400... etc)
also, one area/room can have multiple enemy datas... because the types of enemies change on the time of day. so it's more to think about. (but the different times of day are next to each other, so that is good)
be patient, i will try to add it soon. at the moment i'm working on a game for switch...