You can import books made by CyberArticle(4.x/3.x).
 
In CyberArticle, click "Main Menu->File->Import->Import *.book files" successively and "Import CyberArticle 3.x/4.x books" dialog will be displayed:
 
 
Click "Add" button so as to add *.book files in CyberArticle old version and click "OK" button. Then *.book files will be imported.

Notice

  • CyberArticle3.x/4.x supports folders encrypting, whereas CyberArticle5.x does not supprot. Therefore, if a folder in old version is set a password, articles in the folder in the converted book will be encrypted (including articles in sub-folders).  The password is as same as the original one.