Hey guys ??
@ivanvash I can see that there are some JS errors in the console so this could possibly be preventing plugin from working properly. Could you please test for conflicts by temporarily using default WordPress theme like Twenty Fifteen and deactivating all other plugins as displayed in the following flowchart to know which theme/plugin is conflicting if any.
https://premium.wpmudev.org/wp-content/uploads/2013/12/Support-Process-Support-Process.png
@wwwolf yes the info is stored in a browser cookie. The duration should be defined in the plugin, I’ve checked the one on your site and everything seems to be in order, as you can see the cookie should expire sometimes next year https://screencast.com/t/iUq9Si2x.
However, using another browser / incognito mode or simply clearing browser cache and cookies will reset that if that makes sense.
Best regards,
Bojan