This version finally uses YAML, and JSON will not be used anymore. To use this version, you'll first need to convert your .json files to .yml. To do that, you'll have to install version 1.8.0 pre (if you installed 1.7.57 or 1.7.58 and you have .yml files in your BossMania folder, you'll have to delete them, as they will not work), then after you have installed 1.8.0 pre, you'll have to check if yml files are created, there must be files with the names: AutoSpawns.yml, Bosses.Yml and CustomSkill.yml (CustomSkill.yml is only needed if you every created custom skills), if one is missing, then you have to modify something that regards the file that is missing, for example if the customSkills.yml file is missing, you'll have to modify something in each CustomSkill, so like add an action and remove it, in each custom skill you have, will make that custom skill be saved, or if autoSpawns.yml file is missing, you'll have to modify something in each autospawns like the timer for each autospawn you have, and then will be saved. But instead, if the bosses.yml is missing, a restart will be enough to make every boss get saved., after modifyng something, restart the server and the yml files will be there. After you're sure that all the files are converted to .yml, you can update to this version, and BossMania will finally use YAML to save and load files. I know its a bit boring to do but this conversion had to make, and i also had a lot of work to do to build this conversion tool and not make you remake everything <3