Hello, @Flood and Flood's wife, and thanks for your swift support!
In regards to personal information such as E-mail, you're probably referring to the new UI's image which contained an E-mail address.
I'd like to assure you that no personal information has been given out with that since that E-mail address is probably not used in any real scenario and the image is taken from a famous online Youtuber that made it visible to everyone.
For the dark theme in KTS: I tried following that guide, but the Design Theme block mentioned it is not present in my application settings.
I downloaded the application following this link here: https://support.kaspersky.com/kts20
What about the message I've shown saying I "cannot use" the application in the European Union?
Also, I may have missed it but, to upgrade to Plus or Premium do I basically need to buy full price the product again? Or do I just need to uninstall this suite and install the new corresponding one?
Thanks!