Worked and restored all of my whatsapp data!
Did have to pay for the full version, think it's a bit tricky in the way it makes you think a trial version will be ok, think it would be better just to say from the start you'll need to pay, would have saved some time. Also there is a lot of jumping through hoops, which is sort of to be expected in regards to encrypted data and unlocking access to it, so make sure you know all your old passwords!