> For the complete documentation index, see [llms.txt](https://docs.rmhpos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rmhpos.com/installation/install-central-manager-multi-store/backward-compatibility.md).

# (Optional) Use the Backward Compatibility Extension

- [About the Backward Compatibility Extension](https://docs.rmhpos.com/installation/install-central-manager-multi-store/backward-compatibility/about-the-backward-compatibility-extension.md): This topic explains the purpose of the Backward Compatibility Extension and summarizes how to deploy it to stores.
- [Install the Backward Compatibility Extension](https://docs.rmhpos.com/installation/install-central-manager-multi-store/backward-compatibility/backward-compatibility-installation.md): This topic describes how to install the Backward Compatibility Extension on a store computer.
- [Identify the stores that are Flash and non-Flash](https://docs.rmhpos.com/installation/install-central-manager-multi-store/backward-compatibility/backward-compatibility-identify-stores.md): This topic describes how to identify stores that are Flash and non-Flash in Central Server.
- [Turn off the worksheet processor service](https://docs.rmhpos.com/installation/install-central-manager-multi-store/backward-compatibility/backward-compatibility-worksheet-processor.md): This topic describes how to turn off the RMH Worksheet Processor service on store computers running the Backward Compatibility Extension. The extension uses the RMH Central Custom service.


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