Can't use LionEditor more than once

[Lief Katano]

Per the title. Got LionEditor working once, and edited some stuff. Opened up the game, realized I made some mistakes, and tried to open the file back up again... only to be met with the editor not properly loading the file.

Everything I did the first time is working fine, and there's no problems in the game itself. No matter what I do, though, I can't reopen save in LionEditor.