I received this error in a red pop-up:
I ran the converter and then ..."Notice: The following SFS files located in directory /mnt/home are the wrong version for the current Linux kernel: pdfshuffler.sfs
"The above files will be ignored.
"The kernel requires squashsfs, version 4, SFS files.
"Note, there is a SFS-version-converter in the utility menu."
Note 1: I received the same error but the file now showed in the left column of the "Bootmanager configure bootup" menu.
Note 2: I renamed pdfshuffler-sfs4.sfs TO pdfshuffler-431-sfs4.sfs
Note 3: I also renamed the original pdfshuffler.sfs TO pdfshuffler-old-sfs (I do not know if that was necessary.)
pdfshuffler DOES run from Console but does not create a entry in the Desktop Menu under Documents or any other category.