Click the 'My Account' in the top-right corner, then choose 'More tools...' and select 'Reset configuration...'. This resets the preset data records in the 'Configuration' module back to their factory defaults.
This is also a useful way to switch the preset records to a different language. For example, if you initially set up Unusual Suite in English, the preset data records will contain English content. You can switch those presets to German by changing your setup language to German (via 'Settings...') and then running this reset.
Note: Configuration data records that you added yourself won't be affected by the reset.