Your screenshot shows the File menu from the Main menu. The main menu provides settings that influence ALL images. Note that MRIcroGL can load multiple images simultaneously that can each have different properties. Therefore, to find details regarding a specific image you must select it in the "Layers" panel and choose image specific options from the "Options" drop down menu in the Layers panel. Note that this drop down menu has an option named "Show header". The image is visibly Asymmetric. 

Since the header does not report if it is 2009a, 2009b or 2009c I would assume it is the original (2009a) version before the revisions were added, but you can test this assumption yourself:

https://www.bic.mni.mcgill.ca/ServicesAtlases/ICBM152NLin2009

https://www.bic.mni.mcgill.ca/ServicesAtlases/ICBM152NLin2009