The first post in this thread has copies of the latest versions. You would use the pbimageviewer.app-Pro-360+ version on the 912.
You should definitely try the newer version. I believe that I upgraded to using unrar-5.3.8 from unrar-4.0.7 in 2015, so that may be more compatible with your Winrar version. If you are still getting error = 13 (ERAR_BAD_ARCHIVE), then your new version of Winrar is probably not compatible with the older version used by pbimageviewer.
I regularly use pbimageviewer on my 902, so I know that the program still generally works on the Pro+ devices.
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