Take a copy of your epub, rename the extension: epub to zip.
Unzip this file and open the folder: "[folder unzipped] > OEPBS > Text > [file]"
Open with Dreamweaver, is the best way, easy, to manage links.
After all, zip the [folder unzipped], rename to epub and see it.
Or you can open epub directly on Sigil and edit them.
I did rename the extension. When I double clicked on it, it still opened in Adobe Digital Editions.
I can't figure out why it won't unzip or open.
Are you using a Mac or PC?
If Mac get Alladin Stuffit Manager to unzip, If PC get Winzip or WinRar to unzip the file.
I got it! Thank you !
Before you do lots of work on your unpacked e-pub, try re-zipping and test if it is still usable.
Some (... lots of ... most, perhaps) e-readers cannot handle any random zip packager messing around with the order of files. There are special utilities to re-package your files Just The Right Way.