# Changing default CODESYS version

**URL:** <https://www.wago.community/t/changing-default-codesys-version/902>\
**Category:** CODESYS\
**Tags:** codesys\
**Created:** [April 26, 2024, 5:33am UTC](https://www.wago.community/t/changing-default-codesys-version/902 "2024-04-26T05:33:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![quenorha](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/quenorha/32/429_2.png) [@quenorha](https://www.wago.community/u/quenorha)\
**Post date:** [April 26, 2024, 5:33am UTC](https://www.wago.community/t/changing-default-codesys-version/902/1 "2024-04-26T05:33:21Z")

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Hello community,  
Does anyone knows how to set as default a specific CODESYS installation when several are installed on the same machine ?  
It looks it is always the last installed.  
I don’t find a CODESYS Installer option to do so.

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/35c7098fb7f4f40d52492fde88a24440c15d3490.png)

Thanks

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [April 26, 2024, 8:10am UTC](https://www.wago.community/t/changing-default-codesys-version/902/2 "2024-04-26T08:10:42Z")

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Good afternoon, it’s not entirely clear for what purpose? Let’s say I have version 4 and use a shortcut on the desktop to launch the one I need.

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**Author:** ![quenorha](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/quenorha/32/429_2.png) [@quenorha](https://www.wago.community/u/quenorha)\
**Post date:** [April 26, 2024, 8:27am UTC](https://www.wago.community/t/changing-default-codesys-version/902/3 "2024-04-26T08:27:10Z")

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To make it clear the purpose is to choose which version is started when I open a .project file.  
For instance I have a 3.5.17 32 bits version installed, when I double-click on a previously created project (based on 3.5.19 64 bits), the 3.5.17 version is opened and it leads to a crash since this not a 64 bits version.

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**Author:** ![PatrickR](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/patrickr/32/262_2.png) [@PatrickR](https://www.wago.community/u/PatrickR)\
**Post date:** [April 29, 2024, 5:04am UTC](https://www.wago.community/t/changing-default-codesys-version/902/4 "2024-04-29T05:04:27Z")

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Hi, in my case it works if you right click on the project file → open with → CODESYS Installer GUI and then I can choose the CODESYS version …

![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/3d8e087562b2ad227bcd628560efec1678029410.png)