We are not aware of any incidents involving our servers on Sunday, you may check the status of all our systems in case of doubt here:
https://status.otoy.com/If you come across any issues with activation in the future, please report it to us as soon as possible providing any relevant screenshots and OS and software versions.
Regarding your request, the subscription license requires online authentication every time it starts by design, otherwise the licensing system could be easily bypassed.
Thank you.