If you are trying to open .daa files following the below mentioned steps would ease off the entire procedure. The very first thing that you are required to do is to change the .daa files into ISO format. Once this is done, you can easily extract the files. This is discussed below in detail:
Download DAA 2 ISO from here and save it on the desktop. You will get a folder named daa2iso by extracting the zip folder. Two daa2iso files are present in this folder. One of them would have a colorful icon and would be labeled as application. Double click on that file.
On clicking that file a command prompt and a window would appear. There would be a number of files in the window, double click on the .daa file that needs to be opened.
Another window would appear in which you will be asked to enter the file name. Key in the file name and click on the save button. You will see the command prompt window with confirmation and the file would be extracted within a fraction of seconds.
You can now close the command prompt and open the converted .iso file with the help of 7Zip.
In case you do not have 7Zip, you can download IZArc from , install it and then open the file by following a few above mentioned simple steps.