The following are steps on how to update your mod that is current hosted on Thunderstore.
- Obtain your mod files. This can either be done by downloading your mod from your Thunderstore page, or by having a copy handy from when you uploaded it in the first place. You should have something like this: - MyMod/ [mod files] manifest.json icon.png README.md
- Open your - manifest.json, and increase the- "version_number"according to semantic versioning . In short, if you are making a patch (minor change, fix) increase the third number (1.2.3 -> 1.2.4). If you are making a larger change increase the second number (1.2.3 -> 1.3.0). If you are making an extremely big change that adds or changes major things, increase the first number (1.2.3 -> 2.0.0).
- Change your [mod files] to their newer version, making sure to follow Thunderstore's packaging rules. 
- Zip your files together once more for upload. 
- Upload your mod in the same place you uploaded it the first time, making sure to select the correct tag(s).