Ok, managed to get it working, here's how:
1) In the VMware\VMware VIX folder there is a vixwrapper-config.txt file. Make a backup and overwrite the following over the content of the file:
#@Version-Info
#
# VixAllProducts revision mapping for Workstation/Player
#
# This file translates product version specifications into the appropriate Vix
# implementations.
#
# Each @Version-Info line has 5 white-space seperated entries:
#
# provider-type: ws, esx, viserver, etc
# apiVersion: the apiVersion supported, as passed in from VixHost_Connect()
# ipc-type: none, vmdb, vmodl, cim
# product-version: the product version string
#
# implementation-directory: the path to the library that implements the
# version described by the first 4 parameters
#
#
# The configuration is based on the first 4 fields, which describe
# the product. The 5th field is the location. To force it to try
# multiple location, the same configuration can be repeated. Note that
# list is built in LIFO order, so the latest entry in the configuration
# will be the first used. If for some reason that value fails, it will
# continue through any other matches.
# Workstation 11.1.2 and Player 7.1.2
ws 17 vmdb 11.1.2 Workstation-11.0.0-and-vSphere-6.0.0
player 17 vmdb 7.1.2 Workstation-11.0.0-and-vSphere-6.0.0
ws-shared 17 none 11.1.2 Workstation-11.0.0-and-vSphere-6.0.0
# EOF
2) If there is a folder named "Workstation-11.0.0-and-vSphere-6.0.0" then move it somewhere else as a backup
3) Make a copy of the folder "Workstation-10.0.0-and-vSphere-5.5.0" and name it:
Workstation-11.0.0-and-vSphere-6.0.0
4) Don't forget to add the vmrun path to the user variable: PATH (the vmrun path should be something like this: "C:\Program Files (x86)\VMware\VMware VIX\")
Now the vmrun commands should work.
The following command opens the VM:
vmrun -T player start "D:\myUser\VMWare\Windows7\Windows 7.vmx"