Hi @vadimko,
I’m sorry you are having problems.
The settings are located in Contact -> PayPal & Stripe Settings. Here is a screenshot: https://i.imgur.com/ei2hbrY.png
Also, Stripe works perfectly fine.
Please consider changing your review as it is a question and not a review of the plugin. I’ve put a lot of work into this plugin and reviews like this really hurt the plugin and misleads people into thinking it does not work. If you have questions please post them in: https://www.ads-software.com/support/plugin/contact-form-7-paypal-add-on/
Thanks,
Scott