A simple notepad like application, a binary ipl decompiler. You can make quick edits to your file without worrying about which format your file is in. If the file is in the binary format while saving the file would get converted back to binary and if it was text it’ll get saved as text.
I tested with a couple of files and seems to work just fine.
Undo & redo doesn’t work along with few other stuff. I tried but it seems like a limitation of the framework and not likely to get added anytime soon so…