File shows as checked out but loads in Read-only mode, can't edit
I'm using Adobe Dreamweaver CC 2015. I recently had a computer failure and had to move my backup to a new one (everything was working fine before that).
Now when I double click a file from our web site in the files pane a dialog box come up that looks like this:

It used to give you the option to check the file out so that you could edit it. At the same time a window pops up with info about incomplete file activity, like this:

The rest of the message that is cut off says:
eigenvector/courses/EigenU_Data_and_Models.html - error occurred - An FTP error occurred - cannot get EigenU_Data_and_Models.html. Access denied. The file may not exist, or there could be a permission problem.
I tested the FTP connection under Manage Sites and the connection tested as OK.
In the files pane, you can check out a file, and it shows as checked out, but you still can't edit it.
So what do I need to do so I can edit my web pages? Thanks in advance!
