Have you ever tried a desktop wallet? You can find destkop and web wallets on their site. Wave's wallet was blocked by Google long years ago, if I do not remember wrong.
Thanks for your answer, that's why I don't find lot of things about Waves...
I already downloaded the Waves.Exchange desktop wallet, but I don't find anywhere to import my old private key
EDIT : I finally downloaded WavesFX from the link you gave me and it worked.
Thank you very much !
