I will try to get a build for beta 6 working soon. Each time the kernel changes it is a lot of work becuase of the open-vm-tools is poorly maintained. Often it will not compile with the new kernel and VMWare will not have fixed it. You have to either find existing 3rd party patches to fix it, or make them your self.
You would need to download and install all of these:
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/ap/bc-1.06.95-x86_64-2.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/binutils-2.23.52.0.1-x86_64-2.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/a/cxxlibs-6.0.18-x86_64-1.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/gcc-4.8.2-x86_64-1.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/gcc-g++-4.8.2-x86_64-1.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/l/glib2-2.36.4-x86_64-1.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/l/glibc-2.17-x86_64-7.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/kernel-headers-3.10.17-x86-3.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/l/libffi-3.0.13-x86_64-2.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/l/libmpc-0.8.2-x86_64-2.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/make-3.82-x86_64-4.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/a/patch-2.7-x86_64-2.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/pkg-config-0.25-x86_64-1.txz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/a/pkgtools-14.1-noarch-2.tgz
http://mirrors.kernel.org/slackware/slackware64-14.1/slackware64/d/perl-5.18.1-x86_64-1.txz
Then download and build libdnet:
http://slackbuilds.org/slackbuilds/14.1/network/libdnet.tar.gz
http://downloads.sourceforge.net/project/libdnet/libdnet/libdnet-1.11/libdnet-1.11.tar.gz?r=http%3A%2F%2Fslackbuilds.org%2Frepository%2F14.1%2Fnetwork%2Flibdnet%2F&ts=1396220448&use_mirror=iweb
Then download ans build open-vm-tools
http://downloads.sourceforge.net/project/open-vm-tools/open-vm-tools/Development%20Snapshots/open-vm-tools-2013.09.16-1328054.tar.gz?ts=1380747772&use_mirror=softlayer-dal
using this patch to fix shutdown
http://unraid.zeron.ca/buildscripts/openvmtools/shutdown.patch
and this patch for fix the HGFS build
http://unraid.zeron.ca/buildscripts/openvmtools/vmhgfs-uid-gid-kernel-3.10-tools-2013-09-16.patch
and this patch to fix another build error
http://unraid.zeron.ca/buildscripts/openvmtools/vmbackup-buf-error-tools-2013-09-16.patch
If you do manage to build a new version; you may not redistribute the webgui or script files in /usr/local/emhttp/plugins/openVMTools