Plainly

You can see the result before you pay for it

Which is the right way round: a reconstruction either recovered your table or it did not, and you should be able to tell before any money moves.

Run the conversion, look at what came back, decide. The subscription is what releases the file, and the product says so on the tool page rather than at the end.

An annual plan exists if the monthly rhythm does not suit you. Cancelling is two clicks inside the account, and there is a cancellation page that works without logging in at all.