Removing Mathias' dotfiles settings Just installed Mathias' dotfiles but I didn't like some features of it. Especially executing ./.osx command. For example it's changing dock icons' sizes, removing TimeMachine icons (i'm using it frequently), changing locale settings etc.

How can I revert all settings to default ones, remove all dotfiles settings. 

After this I'll for the dotfiles project and make my own dotfiles based on Mathias' project.
There is no simple command to revert everything to default.

Depending on the number of installed apps besides Apple's own standard apps, it's probably faster to reinstall OS X or restore a backup.

.osx alone modifies about 200 settings - assuming one mod per 4 lines.

Next time better use a hypervisor like VMware or Virtual Box, set up your preferred OS X in a VM and test dotfiles using the snapshot feature.