Some strange observations.
TC-7.x x86 as currently in repo and on my system:
qt-5.x-printsupport.tcz looks OK; Not mis-named.
xfp.tcz.info:
Title: xfp.tcz
Description: X File Package
Version: 1.40
Author: Roland Baudin
Original-site: http://roland65.free.fr/xfe/
Copying-policy: GPL
Size: 300K
Extension_by: Misalf
Tags: X File Package
Comments: Depends on fontconfig and Xlibs_support and fox.
Change-log: ----
Compiled for Tiny Core 6.x
----
Current: 2015/03/15 First version, 1.40
Looks OK.