Checking your Adobe Photoshop Version
The screen shot below, found under the Adobe Photoshop menu commands: Help > About Photoshop ... shows Photoshop Extended is the program and the version is 10 or CS3. 
Reading Adobe Versions
| Photoshop | |
|---|---|
| CS | 8 |
| CS2 | 9 |
| CS3 | 10 |
| CS4 | 11 |