In the setting of the CRM (administrationAdministration/addAdd-ons/CRM/crmReset Data) has 2 3 buttons: Delete all records and reset settings to default and Delete all records
Delete all records and reset settings to default: all your settings and records will be removed. And the initial settings.
Delete all records: delete all records of the following directories: Companies, Contacts, Products, Transactions. The directories that you have created, records will be saved.
Reset CRM Cache: