Just a bit more information on why the format was changed..... The new format will allow you to use a single INI file across multiple drivers. For instance, if you have one HMI talking to 2 PLCs, the setup for both PLCs can both be stored in the same INI file. Another use could be a central file for all of your PLCs. Let's say you have 20 PLCs in the plant and all use an AdvancedHMI application. You could theoretically store the com settings to all the PLCs in one central file, then use that one common file for all of the HMI applications.
Another feature added with the change is that it can be used to set any property, such as Port, PollRateOverride, SlotNumber, etc.