$path = "/some/path/3.5.2+tcl-tk-8.5.18+sqlite-3.10.0/a/b/3.5.2+tcl-tk-8.5.18+sqlite-3.10.0/c";
# and you will see that only the last "/c" is deleted.
/some/path/3.5.2+tcl-tk-8.5.18+sqlite-3.10.0/a/b/3.5.2+tcl-tk-8.5.18+sqlite-3.10.0

##</code><code>##

instead of : 
$path =~ s/.*\Q$version\E\K.*//s;
I probably would have coded:
$path =~ s/(.*\Q$version\E).*/$1/s;