May I change "Paola black image" in Loquendo?

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I would like change black images of Loquendo (computer voices) like I can do for standard voices (bmp file).

I don't know if this is possible, with a bmp file, with a specific software or if it is impossible.

In the folder named "voices" every standard voice has a bmp file associated. Then,when i select or scoll voices, I can see a picture associated at voice with a US, ITA, French,... flag.
In "LoquendoTTS" folder I wish modify computer voice image. They are a bad black silouette.

As far as I know, it's not possible I'm afraid