In the older versions of PSP you could find the "Manual Colour Correction" command under View ---> Colour balance. That option is still there in the newer versions of PSP, it's only hidden. If you'd like to put it back go to:
- View ---> Adjust
- In the Commands tab scroll down to the bottom and click on All commands and try to find the Manual Colour Correction command on the right side.
- Drag the command to the menu where you would like to have the command. In this case you can drag it to the menu Adjust and put it right under Colour balance.
- When your done, click on Close.