The specified software version, Adobe Photoshop CC 2014 v15.2.1.257, represents a specific update within the Creative Cloud ecosystem, released in November 2014. The "Portable" designation indicates a modified version of the official software, engineered to run without a standard installation process.
It generally does not leave traces or create keys in the Windows Registry. Adobe Photoshop CC 2014 V15.2.1.257 -Nov 2014- Portable