I am trying to open a booklet file which was created during a trial and it comes up with the error 'Either the file does not exist, you do not have permission, or the file may be in use by another application? I have paid my subscription but still no luck.
How are you trying to open it?
Do you see the booklet in Finder / File Explorer?
Did you try File > Open or right-click > open from Finder/File Explorer? If not, please try that.
Did you move the file from the original location? One thing is sure: it has nothing to do with the fact that it has been created during the trial period.
The Book File works as a collector to which you can link your InDesign documents.
1. The documents are missing and need to be relinked to the book file
2. Permission has to be updated - if you on a Mac Get Info (CMD I)
and update Sharing & Permissions