First, Please, I don't want to be told how excellent the new version is, I've been using and loving fiddlertool for a very very long time. I suspect that argument would be pointless.
Somehow I failed to install it on my brand new laptop before leaving the town and was required to download the new everywhere version.
Is there an archive that has old versions, even if it's years old is OK.
The Fiddler Classic client for Windows can be downloaded from the official page of the product.