renewing with same registration key which I bought last year if I haven't used it for 2 devices

You need to contact Vanessa on Facebook or chat to the support. They will do it for you, but Vanessa is faster.

Hi, chrismalisilver.

Vanessa of Trend Micro has already received your inquiry. We will assist you from there.

Hi, bvasilev.

Thank you for your prompt responses. We truly appreciate this.

In case you have further inquiries, please let us know immediately.

- Kim