If you're talking about reading an existing save file from the previous version of TaiFab, my experience with GB Studio development has been that every new version renders old saves incompatible (even when all other settings are the same). However, this would be especially true for TaiFab and TaiFabPlus as they are completely different projects with different variable mapping. Sorry for any inconvenience. 😓
However, if you're talking about TaiFabPlus being unable to read its own save files, then I'm really worried! 😬 Could you let me know which of these issues it is?
It's really cool that you make cartridges! Do you have a site I could look at? 🙂