Rated 3 out of 5 stars
Please fix the folder name.
Folder name should be the File Name + "_files".
The fix is simple:
In your add-on's savecomplete.js, go to Line 78.
var folderName = htmlFile.leafName.replace(/\.\w*$/,"").replace(/\s+/g,"_") + "_files";
var folderName = htmlFile.leafName + "_files";
That is how Internet Explorer names folders and it lets you move/copy these Web Page Pairs as a Single Unit.
Folder Name Issue
The folder name issue is now fixed in 0.9b11 - Web Page Pairs should now work correctly.