I grouped 5 layers in photoshop 2015 but was not finished working on the file. I am not able to now ungroup the file to make edits! “ungroup layers” is not selectable. Is there some other way to ungroup layers? Besides the obvious?
My guess is that you mean the file got "flattened" instead of "grouped" and that's why you can't ungroup the layers, because they all merged and became one. Are your layers inside of a set now that is shown by a folder icon in your layers palette? Do you see a folder icon in the stack of layers? See below the attached image.
Or, did all of those layers turn into one layer named "Background" or something else?