Easy. Just open your card on your computer and switch the wrong theme with a working one. Remember to allow the files to be replaced when tranferring them.
How do I switch them?? in the ui folder of the rpg folder, I just have several themes in their own folders. I know that you can switch the themes on the ds by going on the menu of Wood R4, but like i said, this method isn't working.
How can I select a particular theme folder to be the backround when i open my ds again?
Do you know exactly which theme is causing the problem? If so, that's the one that needs switching. The firmware will just read the files when you start it back up. If you don't know which files are the problem ones, backup your games and save files, format that bitch and put the clean firmware and the games back.