Purchased & downloaded TBT from Amazon. It worked fine for a week - I had no problem getting the initial Fed Update at the start of each session. But then suddenly got "A fatal error occurred during installation. Microsoft Installer Error 1603." As suggested, I downloaded the Perrel SuperPatch file and confirmed the "Product SuperPatch has been successfully applied." But after numerous tries, I still get that original "fatal error" message, and could not access the return to work on it further.
I understand I may next need to uninstall the TBT file that I've been working on, and then re-download a new copy of the TBT Deluxe. But in doing so, even if that second copy would indeed work, would I have to lose all the work I have put into return earlier?!
