You're here because you have a file that has a file extension ending in .bkk. Files with the file extension .bkk can only be launched by certain applications. It's possible that .bkk files are data files rather than documents or media, which means they're not meant to be viewed at all.

The BookBuddi software uses files appended with the BKK extension, specifically for the standard file format of projects created and saved with this application. The BookBuddi program is a digital book development and publishing software developed by BookBuddi. This application was developed for users of computers running on Microsoft Windows-based systems. When a user installs the BookBuddi application into his or her Microsoft Windows system, support for creating, opening and viewing the text and image content stored in these BKK digital books will be implemented into the system. The Microsoft Text to Speech Agent, an application bundled with Microsoft Windows-based systems, are programs helpful in aiding blind and visually impaired Microsoft Windows users in accessing digital content stored in these BKK ebooks, since this application is integrated with support to read back the text content in the digital book into spoken audio. The content of these BKK files are referenced by the BookBuddi application when a user views or modifies the associated BKK file using the BookBuddi program, and these reference details also include text and image formatting attributes among other page layout elements entered by the author of the BKK ebook.

Launch a .bkk file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .bkk file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .bkk files aren't yet associated with it. In this case, when you try to open a .bkk file, you can tell Windows which application is the correct one for that file. From then on, opening a  .bkk file will open the correct application. Click here to fix .bkk file association errors

Be careful not to rename the extension on .bkk files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .bkk. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.