Hi,
Normally VMware Tools stays installed. It's not like that it has a mechanism to uninstall itself automatically. When you boot the VM do things like clipboard sharing work? Do you still see the "vm" icon in the lower right of the taskbar (might be hidden automatically, so may need to use the "show more" arrow to display it)?
What is more likely is that the VMware Tools process has crashed somewhere during using the VM. You can restart it manually if it is the vmtoolsd process that quit, or otherwise restart the "vmtools" system service if that's what crashed.
note: I'm only talking within Windows here.
--
Wil
