I just downloaded and installed VMWare and created the virtual machines for Kali and Metasploitable again and that seems to have done the trick. I can now log into metasploitable again. However, I had a quick question about VMWare. When I looked both machines seem to be on NAT and not a NAT-network as previously in Virtualbox. Does this make a difference? And how can I set it up for a NAT-network as Zaid has done so before? I think I have to buy a pro licence to get that and things like snapshots? Is that correct?