# Download

rusEFI offers complete software download bundles for multiple supported microcontrollers and boards.

**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**

## Common Boards

[microRusEFI 0.4 and newer (STM32F4)](microRusEFI-Manual#software)

[Proteus](Proteus-Manual#software)

[STM32 Discovery Release](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_f407-discovery.zip)

## Hellen Family Boards

[Nissan 121 pin](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen121nissan.zip)

[VAG 121 pin](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen121vag.zip)

[Mercedes 128 pin](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen128.zip)

[Miata NBT 72 pin](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen72.zip)

[Miata NA6 64 pin](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellenNA6.zip)

## Uncommon Boards

[Discovery stm32f407 bundle](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle.zip)

[Frankenso PnP Miata NA6 bundle](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_frankenso_na6.zip)

[microRusEFI 0.3 and older (STM32F7)](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_mre_f7.zip)

[Proteus 0.2 and older (STM32F7)](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_proteus_legacy.zip)

## Advanced

[Older Releases](https://github.com/rusefi/rusefi/releases?q=prerelease%3Afalse)

[Nightly Builds](https://github.com/rusefi/rusefi/releases?q=prerelease%3Atrue)

[Snapshot Builds](https://rusefi.com/build_server/)

**[Quick Start](HOWTO-quick-start)**

[Choose Your Own Adventure](Try-It)

[Virtual Simulator](Virtual-simulator)

## 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/)