Downloading the free version of CCS v5.5

Other Parts Discussed in Thread: TMS320F2808, CCSTUDIOHello, I have laptop with a Windows 8 operating system, and I want to do a project for the TMS320F2808, I went to the development tools related to the TMS320F2808 (link http://www.ti.com/product/tms320f2808) and clicked on the Code Composer Studio (CCStudio) Integrated Development Environment (IDE) v5. I clicked on the CCS-FREE download option (link http://www.ti.com/tool/ccstudio) , and on the next page I clicked on the download CCS for Windows (orange button), version 5.5.0.00077 I saved in my computer and I got ccs_setup5.5.0 with this extension .00077[1]. I tried to open it, but can't find the program to open such extension, can someone help me how to open this file? Kindly advice me on the subject at hand. Regards, Forat