It must have to do with the console (control+shift+I); I have tried it before yet to no avail, as I do not seem to manage to save the changes made to the page, if you want to try your luck (or better yet, skill) I would start checking 'knownProducts' and then copying that product to appPurchase or something along those lines (like appPurchase.adfree=true although this does not work for me). you can also check out steamrip for steam downloads, or if you are feeling like risking a virus, IGG is an option with probably more variety. Also I converted some code someone copied to PDF, I will attach it; finally there is a save manager for CoG games on steam, here is the link:
https://github.com/yasirkula/UnityChoiceOfGamesSaveManager/tree/master, with it you can save manually and load your save from that app.