PC Failed...Running older version GameEx

HI All,

I built a stand up machine about 8 years ago.  I have had GameEx running for that long.  I believe the version was 8.17???  I managed to salvage my settings and harddrive content.  I have a couple of questions.

1. On the latest version of GameEx, can I install and keep my settings from the previous version or will  it be a "from scratch setup"?
2. I bought a full license back then, does that still apply for upgrades or will I need to buy it again.
3. If the original license is still good, where is it's info and can I reregister the latest version with it?

Thank you in advance for the help.