Data can be stored in a variety of locations depending on your operating system and choices you made during installation of the program. This data includes your lists, user learning history and learned items. Below you will find a few of the more common locations. You can also try running a search on your computer for files with the B4U file extension.
Applications > Byki4 > Data
Installed for “All Users”
Drive:\Documents and Settings\All Users\Application Data\Transparent\[Byki Version]\Data
Installed for a specific user
Drive:\Documents and Settings\[user name]\Application Data\Transparent\[Byki Version]\Data
Windows Vista, 7, 8