I tried this. Yes, I am using a license key I saved before.
Edit: When I copy and paste from the portal, it doesn't install. (I took special care not to include any spaces), when I click get license key, it seems to install, but it doesn't load in the IDE. There seems to be a state which prevents it from installing to correct locations silently.
Yes, all our development machines are inside of virtualbox, but I did not copy the VM, I just rebooted it.