Similar questions have been covered in this forum before. I don't know how relevant to your problem this solution is but I hope it helps.
When you open the Activ E-Book menu item Edit/User Interface -- at the bottom is a selection for Language and an Edit button. If you click the Edit button and enter a "new" name for your Language file i.e. "English2" and click OK -- you will see a list of the English Language commands and alert boxes.
This file is used to create different Language commands for Activ E-Book but if you simply change the wording of the "Alert" boxes for example, you can replace the word "eBook" for "Program" etc. Now when you save these changes your program will use this ( new Language File ) and display the wording you want.
You'll need to browse through the list and find the entries you want to change. For example select item number 85 "&Search this E-Book" and change the wording to "&Search this Program" and click "OK". That way, in your "Language", the word E-Book doesn't exist.
That particular message looks like it's a MicroSoft Windows message (outside Activ E-Book control). I'd concentrate on the root cause of the message rather than the wording. If you can solve why the message is shown it should disappear.
BTW: This forum is basically a "user" forum. Sunil occasionally answers questions but does not constantly monitor the day to day posts.
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