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Updated How to Install and Use Game Updates (markdown)

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How-to-Install-and-Use-Game-Updates.md
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**NOTE: At the time of writing this, most updates to complex games don't work. This is because newer version uses newer Switch OS features we haven't implemented. Prime your expectations accordingly.**
## How to Install Updates ## How to Install Updates
- If you have an update in NCA format, click `File`, then `Install file to NAND...`, select your update NCA, and then in the drop down box select `Game Update`. If you get an error, double check you encryption keys and dump. - If you have an update in NCA format, click `File`, then `Install file to NAND...`, select your update NCA, and then in the drop down box select `Game Update`. If you get an error, double check you encryption keys and dump.
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- If you copied your NAND or SD or used an NSP update, it will probably say `Update vX.Y.Z` where X, Y, and Z are numbers. Don't be alarmed if the numbers don't match what the game says the version is, the version in the game list is the version as determined by Nintendo's servers, the one in game is independent. - If you copied your NAND or SD or used an NSP update, it will probably say `Update vX.Y.Z` where X, Y, and Z are numbers. Don't be alarmed if the numbers don't match what the game says the version is, the version in the game list is the version as determined by Nintendo's servers, the one in game is independent.
- Updates do *not* apply to deconstructed ROM directories (folder with `main`, `main.npdm`, `game.romfs`, etc). This is because the romfs cannot be guaranteed to be the base game, and patching anything else will result in strange bugs and crashes. If you can guarantee that your romfs is the base game, skip to the [Repacking to NSP](#repacking-to-nsp) section to force yuzu to patch it. - Updates do *not* apply to deconstructed ROM directories (folder with `main`, `main.npdm`, `game.romfs`, etc). This is because the romfs cannot be guaranteed to be the base game, and patching anything else will result in strange bugs and crashes. If you can guarantee that your romfs is the base game, skip to the [Repacking to NSP](#repacking-to-nsp) section to force yuzu to patch it.
**NOTE: All currently known updates require title keys. The title keys are also different than the base game's. Refer to our [key dumping guide](https://github.com/yuzu-emu/yuzu/wiki/Dumping-Decryption-Keys-from-a-Switch-Console) for help.**
## Repacking to NSP ## Repacking to NSP
- If you only have games in directory format, and re dumping is not an option (it's much easier/safer), and you can guarantee that the romfs hasn't been updated or modified in any way, then you can trick yuzu into patching it. First download this [python script](https://github.com/CVFireDragon/nspBuild/releases/latest). You will need Python to execute it. Then copy it to the romfs directory and execute the following in command prompt: `python nspBuild.py out.nsp ...` where ... are the names of all the game files in the dir (`main`, `main.npdm`, `sdk`, `rtld`, `subsdk*`, and `game.romfs`). Then `out.nsp` will contain your packed games and updates will apply to it. - If you only have games in directory format, and re dumping is not an option (it's much easier/safer), and you can guarantee that the romfs hasn't been updated or modified in any way, then you can trick yuzu into patching it. First download this [python script](https://github.com/CVFireDragon/nspBuild/releases/latest). You will need Python to execute it. Then copy it to the romfs directory and execute the following in command prompt: `python nspBuild.py out.nsp ...` where ... are the names of all the game files in the dir (`main`, `main.npdm`, `sdk`, `rtld`, `subsdk*`, and `game.romfs`). Then `out.nsp` will contain your packed games and updates will apply to it.