You're saying you don't know how to start the application?
Mac or PC?
If PC, 64 or 32 bit OS?
If PC and 64 bit OS, the application you're trying to start is:
C:\Program Files\Adobe\Adobe Photoshop CC (64 Bit)\Photoshop.exe
...or maybe, if you're wanting to run the 32 bit version...
C:\Program Files (x86)\Adobe\Adobe Photoshop CC\Photoshop.exe