The setup is very hard for me and it seems to be not working on my store.. I tried now for many minutes again. I tried before also other Date pickers and thought this is now what i need..
We’re very sorry to hear about your experience! While Supertime works out of the box for all of the free themes and many popular themes in the Shopify Theme Store, it may require some additional configuration for custom themes and our team is always available to assist with getting things started.
I do want to note that it looks like you had our app installed for just about 20 minutes before closing down your store without getting in touch first. I'd be happy to help you get connected to someone who can help, so please look out for an email from our support team shortly. We appreciate your patience and are excited to get you back on track.