Reinstalling the ATOM Editor Restores the Pre-Reinstall State

Isn't it this? An example is Windows, but other operating systems may have similar folders.

Reset to Factory Defaults

In some cases, you may want to reset Atom to "factory defaults", in other words clear all of your configuration and remove all packages. This can easily be done by opening terminal and executing:

 C:\>rename%USERPROFILE%\.atom.atom-backup

Once that is complete, you can launch Atom as normal. Everything will be just as if you first installed Atom.

Tip:The command give above doesn't delete the old configuration, just put it somewhere that Atom can't find it. If there are pages of the old configuration you want to retrieve, you can find them in the %USERPROFILE%\.atom-backup

Reset to factory defaults

In some cases, you might want to reset Atom to "factory settings", that is, clear all settings and remove all packages.This can be done easily by opening the terminal and doing the following:

Once that is done, you can start Atom as usual.Everything will be as if you installed Atom first.

Tip: The above command does not remove the old configuration, it just puts it where Atom cannot find it.If there are parts of the old configuration you want to retrieve, you can find them in the directory.%USERPROFILE%\.atom-backup