To get ready for a new season, Probe for Windows can make a copy of an existing season, together with the Full, Refill and PWP values, but without any of the readings.
You need to know the name of the season data file that you want to copy. It will normally be something like
When you go to the sites screen you should see all the sites.
If you go to any readings screen, it should be empty except for Full/Refill/PWP
The numbers on the site screen will need updating with