I don’t think what you’re describing is possible with V5.
It is possible with V6 using an expired license key.
It’s one of the reasons we changed how the evaluation license mechanism works in V6.
You could try just deleting the hidden LIC file, then start V5 and select eval, but I think it will probably fail.
Delete the old license file from your workstation. The LIC file is:
Note: By default, Microsoft has hidden your ProgramData folder. You can either use Folder Options to allow display of hidden files and folders, or you can type %ProgramData% in the address bar in Windows Explorer to navigate to it.