KevinG wrote this on the VMWare Knowledgebase
——————————————————————————————–
Run the following command line option with the VM powered off.
vmware-vdiskmanager -r source.vmdk -t 0 dest.vmdk
Remove the original virtual disk using the hardware wizard and add the new virtual disk using the hardware wizard.
The shrink option will now be available for a growable disk.