Well, you can't use it anyway, since you don't have the key.
As for the WB6 file you downloaded, it might be incompatible. If I remember correctly, there were time where installer released with expiry timer and those were typically replaced with a newer version just before the timer expired—though I'm not sure which version those were. Usually there should be a version without any expiry timer in it.
Thank you,
Basj,
Stardock Community Assistant
