With latest restart a new version of the client have been released, you will need to download the client in order to login.
http://www.padventures.org/index.php/p/v/downloads
OR
https://mega.nz/file/pWwUVCqa#sSqqNfKI943d4D3LqrT6M1-g50SdQgRJdAU731u1tu0
http://www.padventures.org/index.php/p/v/downloads
OR
https://mega.nz/file/pWwUVCqa#sSqqNfKI943d4D3LqrT6M1-g50SdQgRJdAU731u1tu0