My suggestion is to make file managers easier to find in the search section;
"Windows_File_Managers" => As "WFM_ ..."
For the application search, it might make sense to define a name as follows.
wfm_nemo.tcz
wfm_midnight Commander.tcz
wfm_xfm.tcz
wfm_krusader.tcz
wfm_konqueror.tcz
wfm_gentoo.tcz
wfm_dolphin.tcz
wfm_filecommander.tcz
purpose; make linux easy for people all over the world