Fresh user profile

Fresh profile

Log out, open TTY 1 (CTRL-ALT-F1), log in with your p-number.
Back up any important files.
Go to /home and delete the dot files and folders, or your whole /home directory.
Alternatively, write the dot files to a tarball for later reference, and make sure not to delete the tarball.
After you delete your home directory the system will create a new and fresh profile for you when you log in again.

This command forcibly removes all dot files and directory and their content from your home dir:

rm -rf ~/.*

Switch back to your window manager (CTRL-ALT-F7) and log in again.