As of Profound UI Version 5, Fix Pack 4.1, the method used to load data with the "chart url" property changed. The new method solved issues with international characters in the data URL with some browsers. In case of backwards-compatibility issues this flag is available.
When the flag is not defined or false, charts load using the newer, international-safe method. When the flag is true, the older method is used.
Where do you save this configuration option? Here
Read about the newer options in FusionCharts.