# Upgrade AS3 to AS4 with safety PLC

**URL:** <https://community.br-automation.com/t/upgrade-as3-to-as4-with-safety-plc/6907>\
**Category:** B&R Software & Runtime\
**Tags:** automation-studio\
**Created:** [May 12, 2025, 10:57am UTC](https://community.br-automation.com/t/upgrade-as3-to-as4-with-safety-plc/6907 "2025-05-12T10:57:20Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![pavel.vavra](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/pavel.vavra/32/9893_2.png) [@pavel.vavra](https://community.br-automation.com/u/pavel.vavra)\
**Post date:** [May 13, 2025, 8:14am UTC](https://community.br-automation.com/t/upgrade-as3-to-as4-with-safety-plc/6907/4 "2025-05-13T08:14:58Z")

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The only compatible combination for Windows 11 is SR 1.10 + SafeDESIGNER 4.4.1. See [this topic](https://community.br-automation.com/t/windows-11-compatibility-of-safedesigner/5195).

> [@Windows 11 compatibility of SafeDESIGNER](https://community.br-automation.com/t/windows-11-compatibility-of-safedesigner/5195/1):
>
> Since this question has been asked in the community a few times, let me share this news with you.
> 
> **SafeDESIGNER can be used in Windows 11.**
> 
> Compatibility tests showed no limitations or incompatibilities. This includes Safety Release 1.10 (SafeDESIGNER 4.4.1) and all mapp Safety versions.
> 
> There could be some issues when upgrading from Windows 10 to Windows 11. Please reinstall SafeDESIGNER in that case.

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_[View the full topic](https://community.br-automation.com/t/upgrade-as3-to-as4-with-safety-plc/6907)._