I had to use dis2app to dump a certain game (Donkey Kong Country: Tropical Freeze), but in order to extract the files (with uwizard) the rom has to be .wud. How can I change it?

Oh, thanks, it worked!you could use something else than Uwizard to extract the encrypted files.
you can find here all the tools to convert from/to each format :
https://gbatemp.net/threads/the-dif...-and-how-to-convert-them.449212/#post-6845070
look for "NUS content de/encrypters"

