Originally Posted by Katdragon
When I look in the actual Kindle folder it doesn't even have a "system" folder, let alone the collections.jso file.
Since you just ran preview, nothing has been changed.
Windows is hiding the directory from you since it doesn't trust you (well, not you in particular
Depending on your version of Windows, go to the control panel under Appearances, change Folder options, and make sure the settings allow showing hidden files AND showing system files. Unfortunately the "system" directory is seen as a system file and needs the second option as well.
I've added a note about this in first post, so thanks.