# Default program file extension

**URL:** <https://discourse.shapr3d.com/t/default-program-file-extension/24192>\
**Category:** Modeling Questions\
**Created:** [February 17, 2023, 3:35pm UTC](https://discourse.shapr3d.com/t/default-program-file-extension/24192 "2023-02-17T15:35:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ptegler](https://avatars.discourse-cdn.com/v4/letter/p/c0e974/32.png) [@ptegler](https://discourse.shapr3d.com/u/ptegler)\
**Post date:** [February 17, 2023, 3:35pm UTC](https://discourse.shapr3d.com/t/default-program-file-extension/24192/1 "2023-02-17T15:35:39Z")

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Windows has ._shapr_ file extension associated with the 3dshapr app. How can I associate _.step/.stp_ extensions with the shapr app? I know how to associate programs with file types in windows, i just can’t figure out how to point at shapr3d when doing the file association

tia