Based on your system specifications, I would recommend using Adobe Photoshop CC (Creative Cloud) or an older version like Photoshop CS6.
Photoshop CC is the latest version of Photoshop, and it offers a range of advanced features and improvements. However, it may require more processing power and RAM to run smoothly compared to older versions. Since your computer has an AMD Athlon II X2 processor and 8 GB of RAM, it should be able to handle Photoshop CC without major issues.
If you prefer a slightly lighter version of Photoshop that still offers a comprehensive set of features, Photoshop CS6 would be a suitable choice. It is a stable and reliable version with many powerful tools for photo editing and graphic design. It is less demanding on system resources compared to newer versions like Photoshop CC.
Ultimately, the choice between Photoshop CC and CS6 depends on your specific needs and preferences. If you require the latest features and don't mind potential performance differences, Photoshop CC would be the better option. However, if you prefer stability and have concerns about system performance, Photoshop CS6 should meet your needs.