there is no free upgrades option on this trainer welp I didn't see that when I looked at it ignore this
[Edited by Nook, 4/6/2022 4:15:36 PM]
The trainer was updated Nook. That option is there now. If you are having trouble with it, please provide a savegame.
what are you trying to upgrade and what level are you at?
this option sets the upgrade costs to zero.
can confirm, core upgrades unaffected