Friends don’t let friends manually dig through a GUI to find registry stuff. Use Get-PSDrive and you should see HKCU and HKLM under name. Use the Get-ChildItem to navigate around HKLM like you would folders on a hard drive. Use PowerShell’s auto-complete to help typing when you know the path you want.

Here’s the one-liner to see the version:

gci 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\'