Seems I lost some files. The Continue button doesn't work for me, I couldn't find the progress I did before. :(
Viewing post in Mahō Shōnen: Magical Battler comments
I have been working on this tool, but it's a bit experimental:
https://caesarcub.itch.io/magical-battler-transfer-tool?secret=1kmWzFkk9qC9WqHAw...
It let's you export a save and then REPLACE another save with the one you exported.