It’s the same as the other sensors, you just have to follow the manual.
First define the folder:
Select “Save and exit” and proceed with “No” if you are asked if you want to change the folder.
Then, use the S1 import, depending on if you have unzipped your data or not. (unzipped in my case)
Select a swath and hit “Ok” next to it, let PolSARpro create a working folder if asked for
Then proceed with “OK” at the bottom.
Then Extract your data into an file
Select your directory and plot your data: