In Corel PHOTO-PAINT 10 all bitmap effects such as Add Noise, Gaussian Blur and others are completely changed.
And similar changes are for every bitmap command. Obviously none of Photo-Paint 9 scripts now works with Paint 10 because of this. Fortunately now you can download and use this utility and convert all your scripts. This program is quite smart and does a lot of work to optimize your scripts. I'm sure you will find it quite ingenious when you see the results...
There is a bad news, though. Because all Photo-Paint 10's effects now use single "BitmapEffect" command in scripts, a lot of code was rewritten inside the application and as a result many bugs were introduced. Some effects always show dialog boxes despite all the parameters you try to specify in script. Some commands are not implemented correctly at all, so you might need to find alternative ways of doing things (use another effects instead of those broken). The script converter will warn you if any of the "problematic" commands were used in your script. Hopefully those bugs will be fixed soon.
Here is how the script converter works. You specify several files to convert and it changes old command syntax into the new one used by Photo-Paint 10. The converted scripts are saved back into the same files, but the original scripts are saved into .bak files.