Muchas gracias!
I didn't consider the possibility to use the trial days to restore my data. I upgraded now to Premium, restored my note, and I will consider if the premium version will be worth to keep or if I cancel the contract.
In fact, have hundreds of notes, but they are all text documents and links, so no MB-intense data where Premium would be a huge benefit.
However, I am very happy to have my data back! This Premium function is truely valuable. Thanks, PinkElephant!