# Confused about Runner

**URL:** <https://discourse.psychopy.org/t/confused-about-runner/16212>\
**Category:** Builder\
**Created:** [September 3, 2020, 7:13pm UTC](https://discourse.psychopy.org/t/confused-about-runner/16212 "2020-09-03T19:13:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![YT\_HAN](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/yt_han/32/4680_2.png) [@YT\_HAN](https://discourse.psychopy.org/u/YT_HAN)\
**Post date:** [September 3, 2020, 7:13pm UTC](https://discourse.psychopy.org/t/confused-about-runner/16212/1 "2020-09-03T19:13:42Z")

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I have some old experiments (back in 3.1.0) but needs to update them, so I installed the 2020.2.3 as recommended for Mac Catalina 10.15.6. However, I have some questions:  
All I would like to do is edit in builder and add js code code component and sync to Pavlovia. And then run the study online and debug. 1, But when I make edits in js code component in builder, I have noticed sometimes sync only updates the psyexp file, but not the js files. Is this related to the compiling issue as mentioned [here](https://discourse.psychopy.org/t/new-version-of-psychopy-doesnt-compile-script/15987/5)? If so, how can I solve it? I couldn’t locate the userPrefs.cfg file, and editing Darwin.spec file doesn’t seem to make a difference either. 2, Is it possible to just turn off runner?

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**Author:** ![TParsons](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/tparsons/32/8301_2.png) [@TParsons](https://discourse.psychopy.org/u/TParsons)\
**Post date:** [September 7, 2020, 1:26pm UTC](https://discourse.psychopy.org/t/confused-about-runner/16212/2 "2020-09-07T13:26:27Z")

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If Psychopy isn’t throwing an error and crashing when trying to compile then it won’t be the `useRunner` issue, how are you compiling to JS? Are you doing so by pressing the Pavlovia sync button:  
 ![globe_greensync32@2x](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/c/2/c2d8f5f703b30185139e94538789da54e754484a.png)  
or by going to File → Export HTML?

Which tab is your JS code in? In the latest bug fix release (2020.2.4) we found and fixed a bug which was causing code in the Before Experiment tab to only appear in the `.py` file and not `.js`, so it could also be that (in which case, updating to 2020.2.4 should fix it).

For future reference also, if you ever need to find your `userPrefs.cfg` file, the quickest way to get there is to go to View → Themes → Theme Folder and then go up one level in your file browser - as the Themes folder and config files are in the same folder.