Adding new versions

Update the meta.json file

Open the meta.json file. In this file, there should be an array with the name versions.

In versions, add a new object at the end of the array with the following properties:

id: The version id of your modpack (1.0.0, v15, anything, etc..)
releasedAt: The amount of milliseconds since January 1, 1970 UTC.
promotions (Optional): An object with the following properties:

• downloads (Optional): An object with the following properties:
  • modrinth (Optional): A link to download the modpack on Modrinth.
  • curseforge (Optional): A link to download the modpack on Curseforge.
  • generic (Optional): A download link that is neither Modrinth nor Curseforge.

updateType (Optional): A string with one of the following:

• minor
• minor_breaking: Will show a backup screen upon entering an older world.
• major: Will show a backup screen upon entering an older world.
• incompatible: Will prevent users from entering old worlds.

Example:

...
"versions": [
    ...
    {
        "id": "1.0.0",
        "releasedAt": 209384093820,
        "promotions": {
            "downloads": {
                "modrinth": "https://modrinth.com/",
                "curseforge": "https://curseforge.com/",
                "generic": "https://example.com/"
            }
        }
    }
]
...

Create a new folder in the versions subdirectory with the same name as the previously specified id

In that folder, create a new file called changelog.txt and add the changelog to it.

Assuming the new version is called "1.0.0", the folder should look like this:

Modify Modpack Update Checker's config so that currentVersion is equal to id.