hi,
try this:

@FATCAT_matplot_shiny -ShinyFolder /home/naveed/R/x86_64-pc-linux-gnu-library/3.4/shiny/FATCAT_matplot_shiny BS0001MC_20180315.results

It is designed to read all of the matrix like files in that folder.
Also the -ShinyFolder needs the folder with the shiny app in it.
The -ShinyFolder is mainly for testing different versions of the app.

Here is a link to the latest FATCAT_matplot:
https://raw.githubusercontent.com/afni/afni/master/src/discoraj/FATCAT_matplot/FATCAT_matplot

You can right click the link and "save link as". But remember to remove the ".txt" extension.
You should be able to put it in the same location of your current @FATCAT_matplot and use the new one instead.
It should find the shiny/FATCAT_matplot_shiny folder correctly for your system.

Let me know if either works for you.
Thanks, Justin