I don't know why this has happened.

I don't know why this has happened. But I managed to get rid of this message on my computer. It seems that the "application.xml" file is pointing to the wrong language folder for the content files.

On my computer the program is installed to C:Program Files (x86)AdobeAdobe Dreamweaver CS6. If you can browse to this folder using your file manager (in my case "File Explorer", in Windows 8.1), check out the listed folders.

On my setup, note that there is a language folder called "en_US", and there is a bunch of files in it. I believe that this is where the content files are stored, for my installation. There is also a folder called "amt".

Open the folder "amt". You will see that there are a load of language folders in it, including en_IL and en_US. Also note the files listed at the bottom of this folder, paticularly the file "application.xml". I edited this file by right clicking on it, and choosing "Edit". However, when I tried to save the edit, I got the message "Access denied". I did not have the requisite permissions to edit and save the file. So, before editing the file again, I changed the permissions of the file as follows.

In File Explorer, right click on the file "application.xml" and select "Properties". Click on the "Security" Tab. Click "Edit" (to change the permissions). Select "Users". In the window at the bottom, click on "Full control". Then click on "Ok". Then click on "Ok" again on the next page.

Assuming that this has worked, you should now be able to edit and save the "application.xml" file.

So, right click on the file name "application.xml" and choose "Edit". It's a text file, so I edited it in "Notepad". About halfway down the page you will see the term "en_IL". Change this to "en_US" (or whatever the name of the other folder is in your installation folder - see paragraph 3 above). Save the file.

Open Dreamweaver and see if the message has gone, replaced by a tip.