Rewind provides a preview of your pCloud account from a certain point in the past. From there, you can restore or download a certain file, folder or your entire pCloud account at once.
You will find all the files you recover with Rewind in a folder called "Rewind" in your Home directory. Let's say you want to recover 5 files from 1. Feb. 2017 from 01:30 p.m (UTC 2+). You will find them in the Rewind folder, under a subfolder with the name "5 files restored from Feb 01,2017 13:30". You can then move the files wherever you like in your account afterwards.