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rusEFI offers complete software download bundles for multiple supported microcontrollers and boards.
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# IMPORTANT NOTE: TunerStudio v3.1.04 or later is REQUIRED! Please double check the version before updating your firmware, or your settings could be lost when updating!
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### Common Boards
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[microRusEFI 0.4 and newer (STM32F4) ](microRusEFI-Manual#software )
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[Proteus ](Proteus-Manual#software )
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[STM32 Discovery Release ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_default.zip )
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### Hellen Family Boards
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[Nissan 121 pin ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen121nissan.zip )
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[VAG 121 pin ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen121vag.zip )
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[Mercedes 128 pin ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen128.zip )
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[Miata NBT 72 pin ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen72.zip )
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[Miata NA6 64 pin ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellenNA6.zip )
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### Uncommon Boards
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[Discovery stm32f407 bundle ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle.zip )
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[Frankenso PnP Miata NA6 bundle ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_frankenso_na6.zip )
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[microRusEFI 0.3 and older (STM32F7) ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_mre_f7.zip )
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[Proteus 0.2 and older (STM32F7) ](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_proteus_legacy.zip )
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# Advanced
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[Older Releases ](https://github.com/rusefi/rusefi/releases/ )
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[Snapshot builds ](https://rusefi.com/build_server/ )
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# [Quick Start](HOWTO-quick-start)
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[Choose Your Own Adventure ](Try-It )
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[Virtual Simulator ](Virtual-simulator )
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## FAQ
# Q: I see something interesting was just changed in the firmware? How do I use latest version?
A: Most snapshot builds take about 30 minutes to get updated on at [Snapshot builds ](https://rusefi.com/build_server/ )