[NTG-context] automatic filename extension with \externalfigure

Hi, I have an image file with two dots: file.xy.pdf I can embed this file with \externalfigure[file.xy.pdf][][width=\textwidth] When leaving out the extension, the image is not found, e.g.: \externalfigure[file.xy][][width=\textwidth] For the time being, I renamed the files but it would be great if multiple dots in filenames were supported. Thanks, Florian