Older Fitday PC

Hi, I have an older version of Fitday PC. Last night windows did a baaaaaaaaaaad thing and updated, and went into an error loop that would not restart my computer, end of story windows 10 had to be reinstalled and in the repair process it uninstalled many programs. I still HAVE the fitday and I had several files with my registration info on them but....they are corrupted, putting the usb drive with the same file on it into windows and windows very kindly synced my file to the corrupted version. I don't think there is anyway to get my license info back as it has been years I think my version is 2004. What I am wondering is if I get the new version will all the backupfiles I have for myfitday enter in all the custom items I have done over the years, this is what really upsets me is the hundreds of custom recipes and items I have in there.
I have moved across the country so my email is not the same as it would have been as it was through the service provider at the time, this is why I doubt I can get my license info back.

Thank you.

Older Fitday PC