I am running Parallels 14 on Mojave 10.14.2 with 16GB of RAM. Windows is currently assigned 2GB of RAM. I want to increase that to 8GB. When I open "CPU & Memory" configuration screen in Windows 10 all of the potential selections are greyed out. ie: I cannot make changes. A banner at the top of the screen says "Some of the settings on this page cannot be changed until the virtual machine is shut down". I have tried all sorts of variations but still cannot make changes in the CPU and Memory allocation. Any suggestions?