Convert ebook From azw3 to rb

AZW3 file is an eBook created in the Kindle Format 8 (KF8), Amazon's successor to the .AZW format. It supports newer features such as HTML5 and CSS3 support as well as many other formatting capabilities. AZW3 files often include DRM protection and are used as the download format for many Amazon eBooks. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.

An RB file is a configuration file used by Rosebud, a Windows CE and Windows Mobile application that allowed users to control devices via SMS. It contains XML that defines a user's Rosebud commands. Rosebud and RB files were used on Pocket PC devices. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.