This package is hiding many other installed packages from the page where you can see them and this error is displayed in the console:
Cannot read property 'prototype' of undefined TypeError: Cannot read property 'prototype' of undefined
at __extends (C:\Users\%username%\.atom\packages\placeholder-text\lib\placeholder-text-view.coffee:4:199)
at C:\Users\%username%\.atom\packages\placeholder-text\lib\placeholder-text-view.coffee:9:5
at Object.<anonymous> (C:\Users\%username%\.atom\packages\placeholder-text\lib\placeholder-text-view.coffee:62:5)
at Object.<anonymous> (C:\Users\%username%\.atom\packages\placeholder-text\lib\placeholder-text-view.coffee:64:4)
at Module._compile (module.js:452:26)
at Object.defineProperty.value [as .coffee] (C:\Users\%username%\AppData\Local\atom\app-1.0.11\resources\app.asar\src\compile-cache.js:169:21)
at Module.load (module.js:347:32)
at Function.Module._load (module.js:302:12)
at Module.require (module.js:357:17)
at require (module.js:376:17)C:\Users\%username%\AppData\Local\atom\app-1.0.11\resources\app.asar\node_modules\settings-view\lib\installed-packages-panel.js:288 (anonymous function)
This package is hiding many other installed packages from the page where you can see them and this error is displayed in the console:
So I had to disable your package.