You can buy with registration and without registration. Registration Type - Normal Account Creation is optional. Purchase without registration is an additional option.
1. Select the registration type: Site > Control Panel > icon Configuration > tab Global, area User Registration Setting, select User registration type:
Please do not use these registration types:
2. If you use Normal account creation or Silent account creation additional you can enable possibility to buy without registration:
Site > Control Panel > icon Freeshop > icon Global configuration > left menu Checkout > tick the Yes in the row Is allowed buying without registration:
After changes, click Save. Try to buy, check the registration types.